2164623540 has 48 divisors (see below), whose sum is σ = 6189910272. Its totient is φ = 564950656.

The previous prime is 2164623533. The next prime is 2164623563. The reversal of 2164623540 is 453264612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 380979 + ... + 386618.

It is an arithmetic number, because the mean of its divisors is an integer number (128956464).

Almost surely, 2^2164623540 is an apocalyptic number.

2164623540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2164623540 is an abundant number, since it is smaller than the sum of its proper divisors (4025286732).

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

2164623540 is a wasteful number, since it uses less digits than its factorization.

2164623540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767656 (or 767654 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 2164623540 is about 46525.5149353556. The cubic root of 2164623540 is about 1293.5824821727.

The spelling of 2164623540 in words is "two billion, one hundred sixty-four million, six hundred twenty-three thousand, five hundred forty".