625155652021 has 16 divisors (see below), whose sum is σ = 653895010800. Its totient is φ = 597619982400.

The previous prime is 625155652019. The next prime is 625155652027. The reversal of 625155652021 is 120256551526.

625155652021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 5651280625 + 619504371396 = 75175^2 + 787086^2 .

It is not a de Polignac number, because 625155652021 - 2¹ = 625155652019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625155652027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2336395 + ... + 2590183.

It is an arithmetic number, because the mean of its divisors is an integer number (40868438175).

Almost surely, 2^625155652021 is an apocalyptic number.

It is an amenable number.

625155652021 is a deficient number, since it is larger than the sum of its proper divisors (28739358779).

625155652021 is an equidigital number, since it uses as much as digits as its factorization.

625155652021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253977 (or 253919 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 40.

The spelling of 625155652021 in words is "six hundred twenty-five billion, one hundred fifty-five million, six hundred fifty-two thousand, twenty-one".