78557451684 has 24 divisors (see below), whose sum is σ = 183449659008. Its totient is φ = 26164540320.

The previous prime is 78557451677. The next prime is 78557451691. The reversal of 78557451684 is 48615475587.

It is an interprime number because it is at equal distance from previous prime (78557451677) and next prime (78557451691).

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, 2644227 + ... + 2673770.

It is an arithmetic number, because the mean of its divisors is an integer number (7643735792).

Almost surely, 2^78557451684 is an apocalyptic number.

It is an amenable number.

78557451684 is an abundant number, since it is smaller than the sum of its proper divisors (104892207324).

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

78557451684 is a wasteful number, since it uses less digits than its factorization.

78557451684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5319235 (or 5319233 counting only the distinct ones).

The product of its digits is 37632000, while the sum is 60.

The spelling of 78557451684 in words is "seventy-eight billion, five hundred fifty-seven million, four hundred fifty-one thousand, six hundred eighty-four".