16165680687457 has 16 divisors (see below), whose sum is σ = 19225135226880. Its totient is φ = 13304667417552.

The previous prime is 16165680687433. The next prime is 16165680687493. The reversal of 16165680687457 is 75478608656161.

It is not a de Polignac number, because 16165680687457 - 2³¹ = 16163533203809 is a prime.

It is a super-2 number, since 2×16165680687457² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16165680087457) 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, 455122753 + ... + 455158270.

It is an arithmetic number, because the mean of its divisors is an integer number (1201570951680).

Almost surely, 2^{16165680687457} is an apocalyptic number.

It is an amenable number.

16165680687457 is a deficient number, since it is larger than the sum of its proper divisors (3059454539423).

16165680687457 is an equidigital number, since it uses as much as digits as its factorization.

16165680687457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910281132.

The product of its (nonzero) digits is 406425600, while the sum is 70.

The spelling of 16165680687457 in words is "sixteen trillion, one hundred sixty-five billion, six hundred eighty million, six hundred eighty-seven thousand, four hundred fifty-seven".