645424525526 has 32 divisors (see below), whose sum is σ = 1060730681472. Its totient is φ = 292104221760.

The previous prime is 645424525481. The next prime is 645424525553. The reversal of 645424525526 is 625525424546.

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, 6277505 + ... + 6379491.

It is an arithmetic number, because the mean of its divisors is an integer number (33147833796).

Almost surely, 2^645424525526 is an apocalyptic number.

645424525526 is a deficient number, since it is larger than the sum of its proper divisors (415306155946).

645424525526 is a wasteful number, since it uses less digits than its factorization.

645424525526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103244.

The product of its digits is 11520000, while the sum is 50.

The spelling of 645424525526 in words is "six hundred forty-five billion, four hundred twenty-four million, five hundred twenty-five thousand, five hundred twenty-six".