18056165540 has 24 divisors (see below), whose sum is σ = 43334797632. Its totient is φ = 6190685280.

The previous prime is 18056165539. The next prime is 18056165549. The reversal of 18056165540 is 4556165081.

It is a super-2 number, since 2×18056165540² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18056165549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64486166 + ... + 64486445.

It is an arithmetic number, because the mean of its divisors is an integer number (1805616568).

Almost surely, 2^18056165540 is an apocalyptic number.

18056165540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18056165540 is an abundant number, since it is smaller than the sum of its proper divisors (25278632092).

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

18056165540 is a wasteful number, since it uses less digits than its factorization.

18056165540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128972627 (or 128972625 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 41.

The spelling of 18056165540 in words is "eighteen billion, fifty-six million, one hundred sixty-five thousand, five hundred forty".