31601601844428 has 96 divisors (see below), whose sum is σ = 91971343941120. Its totient is φ = 8204689405440.

The previous prime is 31601601844381. The next prime is 31601601844511. The reversal of 31601601844428 is 82444810610613.

It is a super-2 number, since 2×31601601844428² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5174113 + ... + 9485496.

It is an arithmetic number, because the mean of its divisors is an integer number (958034832720).

Almost surely, 2^{31601601844428} is an apocalyptic number.

It is an amenable number.

31601601844428 is an abundant number, since it is smaller than the sum of its proper divisors (60369742096692).

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

31601601844428 is a wasteful number, since it uses less digits than its factorization.

31601601844428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14661967 (or 14661965 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 48.

The spelling of 31601601844428 in words is "thirty-one trillion, six hundred one billion, six hundred one million, eight hundred forty-four thousand, four hundred twenty-eight".