80640096784 has 135 divisors (see below), whose sum is σ = 174583744173. Its totient is φ = 36066715776.

The previous prime is 80640096763. The next prime is 80640096787. The reversal of 80640096784 is 48769004608.

It is a happy number.

The square root of 80640096784 is 283972.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 11929008400 + 68711088384 = 109220^2 + 262128^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80640096787) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 634961329 + ... + 634961455.

Almost surely, 2^80640096784 is an apocalyptic number.

80640096784 is the 283972-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80640096784

80640096784 is an abundant number, since it is smaller than the sum of its proper divisors (93943647389).

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

80640096784 is a wasteful number, since it uses less digits than its factorization.

80640096784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 80640096784 in words is "eighty billion, six hundred forty million, ninety-six thousand, seven hundred eighty-four".