78537622045 has 16 divisors (see below), whose sum is σ = 101316176640. Its totient is φ = 58256794944.

The previous prime is 78537621977. The next prime is 78537622063. The reversal of 78537622045 is 54022673587.

It is a cyclic number.

It is not a de Polignac number, because 78537622045 - 2¹⁹ = 78537097757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78537622045.

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, 8790342 + ... + 8799271.

It is an arithmetic number, because the mean of its divisors is an integer number (6332261040).

Almost surely, 2^78537622045 is an apocalyptic number.

It is an amenable number.

78537622045 is a deficient number, since it is larger than the sum of its proper divisors (22778554595).

78537622045 is a wasteful number, since it uses less digits than its factorization.

78537622045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17589684.

The product of its (nonzero) digits is 2822400, while the sum is 49.

The spelling of 78537622045 in words is "seventy-eight billion, five hundred thirty-seven million, six hundred twenty-two thousand, forty-five".