645311467925 has 12 divisors (see below), whose sum is σ = 800197730496. Its totient is φ = 516241748400.

The previous prime is 645311467841. The next prime is 645311467967. The reversal of 645311467925 is 529764113546.

It is not a de Polignac number, because 645311467925 - 2²⁰ = 645310419349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2176340 + ... + 2455010.

It is an arithmetic number, because the mean of its divisors is an integer number (66683144208).

Almost surely, 2^645311467925 is an apocalyptic number.

It is an amenable number.

645311467925 is a deficient number, since it is larger than the sum of its proper divisors (154886262571).

645311467925 is a wasteful number, since it uses less digits than its factorization.

645311467925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371308 (or 371303 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 53.

The spelling of 645311467925 in words is "six hundred forty-five billion, three hundred eleven million, four hundred sixty-seven thousand, nine hundred twenty-five".