80557664 has 48 divisors (see below), whose sum is σ = 174436416. Its totient is φ = 36316800.

The previous prime is 80557657. The next prime is 80557681. The reversal of 80557664 is 46675508.

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, 45239 + ... + 46985.

It is an arithmetic number, because the mean of its divisors is an integer number (3634092).

Almost surely, 2^80557664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80557664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87218208).

80557664 is an abundant number, since it is smaller than the sum of its proper divisors (93878752).

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

80557664 is a wasteful number, since it uses less digits than its factorization.

80557664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1899 (or 1891 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 80557664 is about 8975.3921362802. The cubic root of 80557664 is about 431.8858294543.

The spelling of 80557664 in words is "eighty million, five hundred fifty-seven thousand, six hundred sixty-four".