2640208625 has 16 divisors (see below), whose sum is σ = 3309531264. Its totient is φ = 2102839600.

The previous prime is 2640208577. The next prime is 2640208657. The reversal of 2640208625 is 5268020462.

It is not a de Polignac number, because 2640208625 - 2⁶ = 2640208561 is a prime.

It is a Duffinian 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, 18149 + ... + 74898.

It is an arithmetic number, because the mean of its divisors is an integer number (206845704).

Almost surely, 2^2640208625 is an apocalyptic number.

2640208625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2640208625 is a deficient number, since it is larger than the sum of its proper divisors (669322639).

2640208625 is an equidigital number, since it uses as much as digits as its factorization.

2640208625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93289 (or 93279 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 2640208625 is about 51382.9604538314. The cubic root of 2640208625 is about 1382.1210512818.

The spelling of 2640208625 in words is "two billion, six hundred forty million, two hundred eight thousand, six hundred twenty-five".