78997597742 has 32 divisors (see below), whose sum is σ = 137257908480. Its totient is φ = 33400379520.

The previous prime is 78997597739. The next prime is 78997597751. The reversal of 78997597742 is 24779579987.

It is a self number, because there is not a number n which added to its sum of digits gives 78997597742.

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, 251609 + ... + 470427.

It is an arithmetic number, because the mean of its divisors is an integer number (4289309640).

Almost surely, 2^78997597742 is an apocalyptic number.

78997597742 is a deficient number, since it is larger than the sum of its proper divisors (58260310738).

78997597742 is a wasteful number, since it uses less digits than its factorization.

78997597742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219176.

The product of its digits is 560105280, while the sum is 74.

The spelling of 78997597742 in words is "seventy-eight billion, nine hundred ninety-seven million, five hundred ninety-seven thousand, seven hundred forty-two".