161156719679 has 16 divisors (see below), whose sum is σ = 163202457600. Its totient is φ = 159125099616.

The previous prime is 161156719673. The next prime is 161156719687. The reversal of 161156719679 is 976917651161.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161156719679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161156719673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44602877 + ... + 44606489.

It is an arithmetic number, because the mean of its divisors is an integer number (10200153600).

Almost surely, 2^161156719679 is an apocalyptic number.

161156719679 is a deficient number, since it is larger than the sum of its proper divisors (2045737921).

161156719679 is a wasteful number, since it uses less digits than its factorization.

161156719679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5414.

The product of its digits is 4286520, while the sum is 59.

The spelling of 161156719679 in words is "one hundred sixty-one billion, one hundred fifty-six million, seven hundred nineteen thousand, six hundred seventy-nine".