16587337380561 has 24 divisors (see below), whose sum is σ = 23979798469536. Its totient is φ = 11048853997440.

The previous prime is 16587337380553. The next prime is 16587337380577. The reversal of 16587337380561 is 16508373378561.

16587337380561 is a `hidden beast` number, since 1 + 6 + 5 + 8 + 7 + 3 + 37 + 38 + 0 + 561 = 666.

It is not a de Polignac number, because 16587337380561 - 2³ = 16587337380553 is a prime.

It is a super-2 number, since 2×16587337380561² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16587337380521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58677046 + ... + 58959056.

It is an arithmetic number, because the mean of its divisors is an integer number (999158269564).

Almost surely, 2^{16587337380561} is an apocalyptic number.

It is an amenable number.

16587337380561 is a deficient number, since it is larger than the sum of its proper divisors (7392461088975).

16587337380561 is a wasteful number, since it uses less digits than its factorization.

16587337380561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287533 (or 287530 counting only the distinct ones).

The product of its (nonzero) digits is 76204800, while the sum is 63.

The spelling of 16587337380561 in words is "sixteen trillion, five hundred eighty-seven billion, three hundred thirty-seven million, three hundred eighty thousand, five hundred sixty-one".