61931691802344 has 128 divisors (see below), whose sum is σ = 193682970996480. Its totient is φ = 16065868492800.

The previous prime is 61931691802247. The next prime is 61931691802349. The reversal of 61931691802344 is 44320819613916.

It is a super-2 number, since 2×61931691802344² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61931691802349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 232301217 + ... + 232567664.

It is an arithmetic number, because the mean of its divisors is an integer number (1513148210910).

Almost surely, 2^{61931691802344} is an apocalyptic number.

It is an amenable number.

61931691802344 is an abundant number, since it is smaller than the sum of its proper divisors (131751279194136).

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

61931691802344 is a wasteful number, since it uses less digits than its factorization.

61931691802344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464868971 (or 464868967 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 57.

The spelling of 61931691802344 in words is "sixty-one trillion, nine hundred thirty-one billion, six hundred ninety-one million, eight hundred two thousand, three hundred forty-four".