18540291456 has 96 divisors (see below), whose sum is σ = 54148138200. Its totient is φ = 6087831552.

The previous prime is 18540291431. The next prime is 18540291463. The reversal of 18540291456 is 65419204581.

18540291456 is a `hidden beast` number, since 18 + 540 + 2 + 91 + 4 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42921 + ... + 197288.

Almost surely, 2^18540291456 is an apocalyptic number.

18540291456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18540291456 is an abundant number, since it is smaller than the sum of its proper divisors (35607846744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18540291456 is a wasteful number, since it uses less digits than its factorization.

18540291456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240296 (or 240281 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 18540291456 in words is "eighteen billion, five hundred forty million, two hundred ninety-one thousand, four hundred fifty-six".