2154534660 has 96 divisors (see below), whose sum is σ = 6994471680. Its totient is φ = 549559296.

The previous prime is 2154534653. The next prime is 2154534709. The reversal of 2154534660 is 664354512.

2154534660 is a `hidden beast` number, since 21 + 545 + 34 + 6 + 60 = 666.

It is a super-2 number, since 2×2154534660² = 9284039202282631200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74317 + ... + 99156.

It is an arithmetic number, because the mean of its divisors is an integer number (72859080).

Almost surely, 2^2154534660 is an apocalyptic number.

2154534660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2154534660 is an abundant number, since it is smaller than the sum of its proper divisors (4839937020).

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

2154534660 is a wasteful number, since it uses less digits than its factorization.

2154534660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173514 (or 173506 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 2154534660 is about 46416.9652174719. The cubic root of 2154534660 is about 1291.5696415130.

The spelling of 2154534660 in words is "two billion, one hundred fifty-four million, five hundred thirty-four thousand, six hundred sixty".