61402631897400 has 384 divisors, whose sum is σ = 194107934243520. Its totient is φ = 16053428551680.

The previous prime is 61402631897359. The next prime is 61402631897413. The reversal of 61402631897400 is 479813620416.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16171352302 + ... + 16171356098.

Almost surely, 2^{61402631897400} is an apocalyptic number.

61402631897400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61402631897400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97053967121760).

61402631897400 is an abundant number, since it is smaller than the sum of its proper divisors (132705302346120).

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

61402631897400 is a wasteful number, since it uses less digits than its factorization.

61402631897400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5995 (or 5986 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 61402631897400 in words is "sixty-one trillion, four hundred two billion, six hundred thirty-one million, eight hundred ninety-seven thousand, four hundred".