6440212504 has 16 divisors (see below), whose sum is σ = 13173162120. Its totient is φ = 2927369280.

The previous prime is 6440212487. The next prime is 6440212591. The reversal of 6440212504 is 4052120446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36592029 + ... + 36592204.

Almost surely, 2^6440212504 is an apocalyptic number.

It is an amenable number.

6440212504 is an abundant number, since it is smaller than the sum of its proper divisors (6732949616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6440212504 is a wasteful number, since it uses less digits than its factorization.

6440212504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73184250 (or 73184246 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 6440212504 is about 80250.9345989192. The cubic root of 6440212504 is about 1860.5159573746.

The spelling of 6440212504 in words is "six billion, four hundred forty million, two hundred twelve thousand, five hundred four".