16501561515051 has 16 divisors (see below), whose sum is σ = 22041706343424. Its totient is φ = 10981229815584.

The previous prime is 16501561515041. The next prime is 16501561515071. The reversal of 16501561515051 is 15051516510561.

It is not a de Polignac number, because 16501561515051 - 2¹⁹ = 16501560990763 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16501561514994 and 16501561515012.

It is not an unprimeable number, because it can be changed into a prime (16501561515041) 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, 86866665 + ... + 87056421.

It is an arithmetic number, because the mean of its divisors is an integer number (1377606646464).

Almost surely, 2^{16501561515051} is an apocalyptic number.

16501561515051 is a deficient number, since it is larger than the sum of its proper divisors (5540144828373).

16501561515051 is a wasteful number, since it uses less digits than its factorization.

16501561515051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241810.

The product of its (nonzero) digits is 112500, while the sum is 42.

The spelling of 16501561515051 in words is "sixteen trillion, five hundred one billion, five hundred sixty-one million, five hundred fifteen thousand, fifty-one".