625540653 has 24 divisors (see below), whose sum is σ = 960156288. Its totient is φ = 391082112.

The previous prime is 625540639. The next prime is 625540673. The reversal of 625540653 is 356045526.

It is a happy number.

625540653 is a `hidden beast` number, since 62 + 5 + 540 + 6 + 53 = 666.

It is not a de Polignac number, because 625540653 - 2¹⁸ = 625278509 is a prime.

It is a super-2 number, since 2×625540653² = 782602217111332818, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625540673) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36076 + ... + 50522.

It is an arithmetic number, because the mean of its divisors is an integer number (40006512).

Almost surely, 2^625540653 is an apocalyptic number.

It is an amenable number.

625540653 is a deficient number, since it is larger than the sum of its proper divisors (334615635).

625540653 is a wasteful number, since it uses less digits than its factorization.

625540653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14753 (or 14750 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The square root of 625540653 is about 25010.8107225656. The cubic root of 625540653 is about 855.2344365849.

The spelling of 625540653 in words is "six hundred twenty-five million, five hundred forty thousand, six hundred fifty-three".