161308739951 has 16 divisors (see below), whose sum is σ = 166417626816. Its totient is φ = 156256800000.

The previous prime is 161308739929. The next prime is 161308740001. The reversal of 161308739951 is 159937803161.

It is a cyclic number.

It is not a de Polignac number, because 161308739951 - 2⁶ = 161308739887 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161308739893 and 161308739902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161308739651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16221641 + ... + 16231581.

It is an arithmetic number, because the mean of its divisors is an integer number (10401101676).

Almost surely, 2^161308739951 is an apocalyptic number.

161308739951 is a deficient number, since it is larger than the sum of its proper divisors (5108886865).

161308739951 is a wasteful number, since it uses less digits than its factorization.

161308739951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12754.

The product of its (nonzero) digits is 1224720, while the sum is 53.

The spelling of 161308739951 in words is "one hundred sixty-one billion, three hundred eight million, seven hundred thirty-nine thousand, nine hundred fifty-one".