161477634931 has 8 divisors (see below), whose sum is σ = 162987414800. Its totient is φ = 159974186112.

The previous prime is 161477634907. The next prime is 161477634973. The reversal of 161477634931 is 139436774161.

161477634931 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 a de Polignac number, because none of the positive numbers 2^k-161477634931 is a prime.

It is a super-2 number, since 2×161477634931² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161477034931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1531506 + ... + 1633543.

It is an arithmetic number, because the mean of its divisors is an integer number (20373426850).

Almost surely, 2^161477634931 is an apocalyptic number.

161477634931 is a deficient number, since it is larger than the sum of its proper divisors (1509779869).

161477634931 is a wasteful number, since it uses less digits than its factorization.

161477634931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3165525.

The product of its digits is 2286144, while the sum is 52.

The spelling of 161477634931 in words is "one hundred sixty-one billion, four hundred seventy-seven million, six hundred thirty-four thousand, nine hundred thirty-one".