16116507855 has 24 divisors (see below), whose sum is σ = 31926035232. Its totient is φ = 7367546304.

The previous prime is 16116507851. The next prime is 16116507877. The reversal of 16116507855 is 55870561161.

It is a happy number.

16116507855 is a `hidden beast` number, since 1 + 61 + 1 + 6 + 507 + 85 + 5 = 666.

It is not a de Polignac number, because 16116507855 - 2² = 16116507851 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 16116507855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16116507851) 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, 25581444 + ... + 25582073.

It is an arithmetic number, because the mean of its divisors is an integer number (1330251468).

Almost surely, 2^16116507855 is an apocalyptic number.

16116507855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16116507855 is a deficient number, since it is larger than the sum of its proper divisors (15809527377).

16116507855 is a wasteful number, since it uses less digits than its factorization.

16116507855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51163535 (or 51163532 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 45.

The spelling of 16116507855 in words is "sixteen billion, one hundred sixteen million, five hundred seven thousand, eight hundred fifty-five".