516180081615 has 16 divisors (see below), whose sum is σ = 900968870016. Its totient is φ = 250269130400.

The previous prime is 516180081607. The next prime is 516180081631.

516180081615 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 516180081615 - 2³ = 516180081607 is a prime.

It is a super-2 number, since 2×516180081615² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1564181901 + ... + 1564182230.

It is an arithmetic number, because the mean of its divisors is an integer number (56310554376).

Almost surely, 2^516180081615 is an apocalyptic number.

516180081615 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

516180081615 is a deficient number, since it is larger than the sum of its proper divisors (384788788401).

516180081615 is a wasteful number, since it uses less digits than its factorization.

516180081615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3128364150.

The product of its (nonzero) digits is 57600, while the sum is 42.

The spelling of 516180081615 in words is "five hundred sixteen billion, one hundred eighty million, eighty-one thousand, six hundred fifteen".