631645251225 has 48 divisors (see below), whose sum is σ = 1056812163264. Its totient is φ = 332869888000.

The previous prime is 631645251191. The next prime is 631645251227. The reversal of 631645251225 is 522152546136.

631645251225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 631645251225 - 2⁸ = 631645250969 is a prime.

It is a super-3 number, since 3×631645251225³ (a number of 36 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (631645251227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2151265 + ... + 2427185.

It is an arithmetic number, because the mean of its divisors is an integer number (22016920068).

Almost surely, 2^631645251225 is an apocalyptic number.

It is an amenable number.

631645251225 is a deficient number, since it is larger than the sum of its proper divisors (425166912039).

631645251225 is a wasteful number, since it uses less digits than its factorization.

631645251225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276298 (or 276293 counting only the distinct ones).

The product of its digits is 432000, while the sum is 42.

The spelling of 631645251225 in words is "six hundred thirty-one billion, six hundred forty-five million, two hundred fifty-one thousand, two hundred twenty-five".