16545766662651 has 16 divisors (see below), whose sum is σ = 22344693840000. Its totient is φ = 10888888108800.

The previous prime is 16545766662641. The next prime is 16545766662673. The reversal of 16545766662651 is 15626666754561.

It is a happy number.

It is not a de Polignac number, because 16545766662651 - 2⁴¹ = 14346743407099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16545766662641) 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, 26289825 + ... + 26911826.

It is an arithmetic number, because the mean of its divisors is an integer number (1396543365000).

Almost surely, 2^{16545766662651} is an apocalyptic number.

16545766662651 is a deficient number, since it is larger than the sum of its proper divisors (5798927177349).

16545766662651 is a wasteful number, since it uses less digits than its factorization.

16545766662651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53202986.

The product of its digits is 326592000, while the sum is 66.

The spelling of 16545766662651 in words is "sixteen trillion, five hundred forty-five billion, seven hundred sixty-six million, six hundred sixty-two thousand, six hundred fifty-one".