78433874537 has 4 divisors (see below), whose sum is σ = 78461045376. Its totient is φ = 78406703700.

The previous prime is 78433874507. The next prime is 78433874551. The reversal of 78433874537 is 73547833487.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78433874537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78433874507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13581089 + ... + 13586862.

It is an arithmetic number, because the mean of its divisors is an integer number (19615261344).

Almost surely, 2^78433874537 is an apocalyptic number.

It is an amenable number.

78433874537 is a deficient number, since it is larger than the sum of its proper divisors (27170839).

78433874537 is a wasteful number, since it uses less digits than its factorization.

78433874537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27170838.

The product of its digits is 47416320, while the sum is 59.

The spelling of 78433874537 in words is "seventy-eight billion, four hundred thirty-three million, eight hundred seventy-four thousand, five hundred thirty-seven".