161929292481351 has 40 divisors (see below), whose sum is σ = 258610091804064. Its totient is φ = 100616259317760.

The previous prime is 161929292481347. The next prime is 161929292481389. The reversal of 161929292481351 is 153184292929161.

It is a happy number.

161929292481351 is a `hidden beast` number, since 1 + 6 + 19 + 2 + 9 + 2 + 92 + 481 + 3 + 51 = 666.

It is not a de Polignac number, because 161929292481351 - 2² = 161929292481347 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161929292481301) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 570711130 + ... + 570994791.

Almost surely, 2^{161929292481351} is an apocalyptic number.

161929292481351 is a deficient number, since it is larger than the sum of its proper divisors (96680799322713).

161929292481351 is a wasteful number, since it uses less digits than its factorization.

161929292481351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141706053 (or 1141706044 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 63.

The spelling of 161929292481351 in words is "one hundred sixty-one trillion, nine hundred twenty-nine billion, two hundred ninety-two million, four hundred eighty-one thousand, three hundred fifty-one".