78728642652 has 24 divisors (see below), whose sum is σ = 200400181632. Its totient is φ = 23857164400.

The previous prime is 78728642647. The next prime is 78728642653. The reversal of 78728642652 is 25624682787.

It is a junction number, because it is equal to n+sod(n) for n = 78728642592 and 78728642601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78728642653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298214424 + ... + 298214687.

It is an arithmetic number, because the mean of its divisors is an integer number (8350007568).

Almost surely, 2^78728642652 is an apocalyptic number.

It is an amenable number.

78728642652 is an abundant number, since it is smaller than the sum of its proper divisors (121671538980).

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

78728642652 is a wasteful number, since it uses less digits than its factorization.

78728642652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596429129 (or 596429127 counting only the distinct ones).

The product of its digits is 18063360, while the sum is 57.

The spelling of 78728642652 in words is "seventy-eight billion, seven hundred twenty-eight million, six hundred forty-two thousand, six hundred fifty-two".