161630764475 has 12 divisors (see below), whose sum is σ = 200689044960. Its totient is φ = 129132420000.

The previous prime is 161630764439. The next prime is 161630764483. The reversal of 161630764475 is 574467036161.

It is not a de Polignac number, because 161630764475 - 2⁸ = 161630764219 is a prime.

It is a super-2 number, since 2×161630764475² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4285640 + ... + 4323189.

It is an arithmetic number, because the mean of its divisors is an integer number (16724087080).

Almost surely, 2^161630764475 is an apocalyptic number.

161630764475 is a deficient number, since it is larger than the sum of its proper divisors (39058280485).

161630764475 is an equidigital number, since it uses as much as digits as its factorization.

161630764475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8609590 (or 8609585 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 50.

The spelling of 161630764475 in words is "one hundred sixty-one billion, six hundred thirty million, seven hundred sixty-four thousand, four hundred seventy-five".