18277958416 has 45 divisors (see below), whose sum is σ = 35983023669. Its totient is φ = 8994319488.

The previous prime is 18277958393. The next prime is 18277958423. The reversal of 18277958416 is 61485977281.

The square root of 18277958416 is 135196.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 10375459600 + 7902498816 = 101860^2 + 88896^2 .

It is a Duffinian number.

Its product of digits (6773760) is a multiple of the sum of its prime factors (1080).

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 39477001 + ... + 39477463.

Almost surely, 2^18277958416 is an apocalyptic number.

18277958416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

18277958416 is the 135196-th square number.

It is an amenable number.

18277958416 is a deficient number, since it is larger than the sum of its proper divisors (17705065253).

18277958416 is an frugal number, since it uses more digits than its factorization.

18277958416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080 (or 538 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 58.

The spelling of 18277958416 in words is "eighteen billion, two hundred seventy-seven million, nine hundred fifty-eight thousand, four hundred sixteen".