78651332498 has 18 divisors (see below), whose sum is σ = 121924532853. Its totient is φ = 38051147160.

The previous prime is 78651332489. The next prime is 78651332563. The reversal of 78651332498 is 89423315687.

It can be written as a sum of positive squares in 2 ways, for example, as 46245212209 + 32406120289 = 215047^2 + 180017^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=198307.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 12291836 + ... + 12298232.

Almost surely, 2^78651332498 is an apocalyptic number.

78651332498 is a deficient number, since it is larger than the sum of its proper divisors (43273200355).

78651332498 is an frugal number, since it uses more digits than its factorization.

78651332498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12858 (or 6430 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 56.

The spelling of 78651332498 in words is "seventy-eight billion, six hundred fifty-one million, three hundred thirty-two thousand, four hundred ninety-eight".