648572645 has 16 divisors (see below), whose sum is σ = 911167488. Its totient is φ = 433887360.

The previous prime is 648572623. The next prime is 648572711. The reversal of 648572645 is 546275846.

It is not a de Polignac number, because 648572645 - 2²⁶ = 581463781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 648572645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224549 + ... + 227418.

It is an arithmetic number, because the mean of its divisors is an integer number (56947968).

Almost surely, 2^648572645 is an apocalyptic number.

It is an amenable number.

648572645 is a deficient number, since it is larger than the sum of its proper divisors (262594843).

648572645 is a wasteful number, since it uses less digits than its factorization.

648572645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452020.

The product of its digits is 1612800, while the sum is 47.

The square root of 648572645 is about 25467.0894489339. The cubic root of 648572645 is about 865.6045736164.

The spelling of 648572645 in words is "six hundred forty-eight million, five hundred seventy-two thousand, six hundred forty-five".