2625787921 has 16 divisors (see below), whose sum is σ = 2798134848. Its totient is φ = 2455488000.

The previous prime is 2625787891. The next prime is 2625787949. The reversal of 2625787921 is 1297875262.

It is a cyclic number.

It is not a de Polignac number, because 2625787921 - 2⁵ = 2625787889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2625787121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2497846 + ... + 2498896.

It is an arithmetic number, because the mean of its divisors is an integer number (174883428).

Almost surely, 2^2625787921 is an apocalyptic number.

It is an amenable number.

2625787921 is a deficient number, since it is larger than the sum of its proper divisors (172346927).

2625787921 is a wasteful number, since it uses less digits than its factorization.

2625787921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872.

The product of its digits is 846720, while the sum is 49.

The square root of 2625787921 is about 51242.4425744909. The cubic root of 2625787921 is about 1379.6000943388.

The spelling of 2625787921 in words is "two billion, six hundred twenty-five million, seven hundred eighty-seven thousand, nine hundred twenty-one".