61402631897358 has 160 divisors (see below), whose sum is σ = 153901802023200. Its totient is φ = 18183810963456.

The previous prime is 61402631897311. The next prime is 61402631897359. The reversal of 61402631897358 is 85379813620416.

61402631897358 is a `hidden beast` number, since 6 + 1 + 4 + 0 + 263 + 18 + 9 + 7 + 358 = 666.

It is a super-2 number, since 2×61402631897358² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61402631897295 and 61402631897304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61402631897359) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 12376138 + ... + 16612466.

It is an arithmetic number, because the mean of its divisors is an integer number (961886262645).

It is a 2-persistent number, because it is pandigital, and so is 2⋅61402631897358 = 122805263794716, but 3⋅61402631897358 = 184207895692074 is not.

Almost surely, 2^{61402631897358} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61402631897358, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76950901011600).

61402631897358 is an abundant number, since it is smaller than the sum of its proper divisors (92499170125842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61402631897358 is a wasteful number, since it uses less digits than its factorization.

61402631897358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4236656 (or 4236647 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 63.

The spelling of 61402631897358 in words is "sixty-one trillion, four hundred two billion, six hundred thirty-one million, eight hundred ninety-seven thousand, three hundred fifty-eight".