78468139572 has 24 divisors (see below), whose sum is σ = 193862462976. Its totient is φ = 24617455488.

The previous prime is 78468139483. The next prime is 78468139597. The reversal of 78468139572 is 27593186487.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192323668 + ... + 192324075.

It is an arithmetic number, because the mean of its divisors is an integer number (8077602624).

Almost surely, 2^78468139572 is an apocalyptic number.

It is an amenable number.

78468139572 is an abundant number, since it is smaller than the sum of its proper divisors (115394323404).

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

78468139572 is a wasteful number, since it uses less digits than its factorization.

78468139572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384647767 (or 384647765 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 60.

It can be divided in two parts, 7846 and 8139572, that added together give a palindrome (8147418).

The spelling of 78468139572 in words is "seventy-eight billion, four hundred sixty-eight million, one hundred thirty-nine thousand, five hundred seventy-two".