16380877918 has 16 divisors (see below), whose sum is σ = 26032093200. Its totient is φ = 7704084096.

The previous prime is 16380877897. The next prime is 16380877939. The reversal of 16380877918 is 81977808361.

It is an interprime number because it is at equal distance from previous prime (16380877897) and next prime (16380877939).

It is a super-2 number, since 2×16380877918² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84021 + ... + 199552.

It is an arithmetic number, because the mean of its divisors is an integer number (1627005825).

Almost surely, 2^16380877918 is an apocalyptic number.

16380877918 is a deficient number, since it is larger than the sum of its proper divisors (9651215282).

16380877918 is a wasteful number, since it uses less digits than its factorization.

16380877918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285291.

The product of its (nonzero) digits is 4064256, while the sum is 58.

The spelling of 16380877918 in words is "sixteen billion, three hundred eighty million, eight hundred seventy-seven thousand, nine hundred eighteen".