78855257724 has 48 divisors (see below), whose sum is σ = 195985536768. Its totient is φ = 24590756608.

The previous prime is 78855257629. The next prime is 78855257749. The reversal of 78855257724 is 42775255887.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1123254 + ... + 1191389.

It is an arithmetic number, because the mean of its divisors is an integer number (4083032016).

Almost surely, 2^78855257724 is an apocalyptic number.

It is an amenable number.

78855257724 is an abundant number, since it is smaller than the sum of its proper divisors (117130279044).

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

78855257724 is a wasteful number, since it uses less digits than its factorization.

78855257724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2314834 (or 2314832 counting only the distinct ones).

The product of its digits is 43904000, while the sum is 60.

The spelling of 78855257724 in words is "seventy-eight billion, eight hundred fifty-five million, two hundred fifty-seven thousand, seven hundred twenty-four".