161925735699 has 192 divisors, whose sum is σ = 307544473600. Its totient is φ = 81478172160.

The previous prime is 161925735661. The next prime is 161925735707. The reversal of 161925735699 is 996537529161.

161925735699 is a `hidden beast` number, since 1 + 6 + 1 + 9 + 2 + 573 + 56 + 9 + 9 = 666.

It is not a de Polignac number, because 161925735699 - 2⁸ = 161925735443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (161925730699) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 90815562 + ... + 90817344.

Almost surely, 2^161925735699 is an apocalyptic number.

161925735699 is a deficient number, since it is larger than the sum of its proper divisors (145618737901).

161925735699 is a wasteful number, since it uses less digits than its factorization.

161925735699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927 (or 1910 counting only the distinct ones).

The product of its digits is 27556200, while the sum is 63.

The spelling of 161925735699 in words is "one hundred sixty-one billion, nine hundred twenty-five million, seven hundred thirty-five thousand, six hundred ninety-nine".