78912859542 has 32 divisors (see below), whose sum is σ = 172189082880. Its totient is φ = 23910825120.

The previous prime is 78912859537. The next prime is 78912859561. The reversal of 78912859542 is 24595821987.

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, 777384 + ... + 873012.

It is an arithmetic number, because the mean of its divisors is an integer number (5380908840).

Almost surely, 2^78912859542 is an apocalyptic number.

78912859542 is an abundant number, since it is smaller than the sum of its proper divisors (93276223338).

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

78912859542 is a wasteful number, since it uses less digits than its factorization.

78912859542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108148.

The product of its digits is 14515200, while the sum is 60.

The spelling of 78912859542 in words is "seventy-eight billion, nine hundred twelve million, eight hundred fifty-nine thousand, five hundred forty-two".