6456420724 has 24 divisors (see below), whose sum is σ = 12172677608. Its totient is φ = 2978709120.

The previous prime is 6456420671. The next prime is 6456420731. The reversal of 6456420724 is 4270246546.

It can be written as a sum of positive squares in 4 ways, for example, as 13468900 + 6442951824 = 3670^2 + 80268^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116014 + ... + 162394.

Almost surely, 2^6456420724 is an apocalyptic number.

It is an amenable number.

6456420724 is a deficient number, since it is larger than the sum of its proper divisors (5716256884).

6456420724 is a wasteful number, since it uses less digits than its factorization.

6456420724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49075 (or 49073 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 40.

The square root of 6456420724 is about 80351.8557595280. The cubic root of 6456420724 is about 1862.0754498837.

The spelling of 6456420724 in words is "six billion, four hundred fifty-six million, four hundred twenty thousand, seven hundred twenty-four".