6467551656 has 32 divisors (see below), whose sum is σ = 16319996640. Its totient is φ = 2135701568.

The previous prime is 6467551639. The next prime is 6467551679. The reversal of 6467551656 is 6561557646.

It is a junction number, because it is equal to n+sod(n) for n = 6467551599 and 6467551608.

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, 1256691 + ... + 1261826.

It is an arithmetic number, because the mean of its divisors is an integer number (509999895).

Almost surely, 2^6467551656 is an apocalyptic number.

It is an amenable number.

6467551656 is an abundant number, since it is smaller than the sum of its proper divisors (9852444984).

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

6467551656 is a wasteful number, since it uses less digits than its factorization.

6467551656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2518633 (or 2518629 counting only the distinct ones).

The product of its digits is 4536000, while the sum is 51.

The square root of 6467551656 is about 80421.0896220637. The cubic root of 6467551656 is about 1863.1449142469.

The spelling of 6467551656 in words is "six billion, four hundred sixty-seven million, five hundred fifty-one thousand, six hundred fifty-six".