78461554624 has 28 divisors (see below), whose sum is σ = 156817288600. Its totient is φ = 38948537088.

The previous prime is 78461554603. The next prime is 78461554667. The reversal of 78461554624 is 42645516487.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4401039 + ... + 4418830.

It is an arithmetic number, because the mean of its divisors is an integer number (5600617450).

Almost surely, 2^78461554624 is an apocalyptic number.

It is an amenable number.

78461554624 is a deficient number, since it is larger than the sum of its proper divisors (78355733976).

78461554624 is a wasteful number, since it uses less digits than its factorization.

78461554624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8820020 (or 8820010 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 52.

The spelling of 78461554624 in words is "seventy-eight billion, four hundred sixty-one million, five hundred fifty-four thousand, six hundred twenty-four".