16556510001651 has 16 divisors (see below), whose sum is σ = 22207782508800. Its totient is φ = 10971456892128.

The previous prime is 16556510001641. The next prime is 16556510001719. The reversal of 16556510001651 is 15610001565561.

It is not a de Polignac number, because 16556510001651 - 2¹⁵ = 16556509968883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16556510001641) 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, 76238460 + ... + 76455318.

It is an arithmetic number, because the mean of its divisors is an integer number (1387986406800).

Almost surely, 2^{16556510001651} is an apocalyptic number.

16556510001651 is a deficient number, since it is larger than the sum of its proper divisors (5651272507149).

16556510001651 is a wasteful number, since it uses less digits than its factorization.

16556510001651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369418.

The product of its (nonzero) digits is 135000, while the sum is 42.

The spelling of 16556510001651 in words is "sixteen trillion, five hundred fifty-six billion, five hundred ten million, one thousand, six hundred fifty-one".