61431756353 has 8 divisors (see below), whose sum is σ = 68115092736. Its totient is φ = 54931525200.

The previous prime is 61431756313. The next prime is 61431756377. The reversal of 61431756353 is 35365713416.

61431756353 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61431756353 - 2⁸ = 61431756097 is a prime.

It is a super-2 number, since 2×61431756353² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61431756313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45775601 + ... + 45776942.

It is an arithmetic number, because the mean of its divisors is an integer number (8514386592).

Almost surely, 2^61431756353 is an apocalyptic number.

It is an amenable number.

61431756353 is a deficient number, since it is larger than the sum of its proper divisors (6683336383).

61431756353 is a wasteful number, since it uses less digits than its factorization.

61431756353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91552615.

The product of its digits is 680400, while the sum is 44.

The spelling of 61431756353 in words is "sixty-one billion, four hundred thirty-one million, seven hundred fifty-six thousand, three hundred fifty-three".