16155561051 has 20 divisors (see below), whose sum is σ = 27581276272. Its totient is φ = 9231748848.

The previous prime is 16155561047. The next prime is 16155561083. The reversal of 16155561051 is 15016555161.

It is a happy number.

It is not a de Polignac number, because 16155561051 - 2² = 16155561047 is a prime.

It is a super-2 number, since 2×16155561051² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16155560997 and 16155561015.

It is not an unprimeable number, because it can be changed into a prime (16155561001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14245960 + ... + 14247093.

Almost surely, 2^16155561051 is an apocalyptic number.

16155561051 is a deficient number, since it is larger than the sum of its proper divisors (11425715221).

16155561051 is an equidigital number, since it uses as much as digits as its factorization.

16155561051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28493072 (or 28493063 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 16155561051 in words is "sixteen billion, one hundred fifty-five million, five hundred sixty-one thousand, fifty-one".