2164552640 has 28 divisors (see below), whose sum is σ = 5154341736. Its totient is φ = 865820928.

The previous prime is 2164552603. The next prime is 2164552661. The reversal of 2164552640 is 462554612.

It is a self number, because there is not a number n which added to its sum of digits gives 2164552640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3381794 + ... + 3382433.

Almost surely, 2^2164552640 is an apocalyptic number.

2164552640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2164552640 is an abundant number, since it is smaller than the sum of its proper divisors (2989789096).

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

2164552640 is an equidigital number, since it uses as much as digits as its factorization.

2164552640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6764244 (or 6764234 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 2164552640 is about 46524.7529816118. The cubic root of 2164552640 is about 1293.5683587008.

The spelling of 2164552640 in words is "two billion, one hundred sixty-four million, five hundred fifty-two thousand, six hundred forty".