74655855647 has 4 divisors (see below), whose sum is σ = 74939718480. Its totient is φ = 74371992816.

The previous prime is 74655855619. The next prime is 74655855721.

74655855647 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 74655855647 - 2¹⁴ = 74655839263 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74655855647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74655855247) 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, 141931022 + ... + 141931547.

It is an arithmetic number, because the mean of its divisors is an integer number (18734929620).

Almost surely, 2^74655855647 is an apocalyptic number.

74655855647 is a deficient number, since it is larger than the sum of its proper divisors (283862833).

74655855647 is a wasteful number, since it uses less digits than its factorization.

74655855647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283862832.

The product of its digits is 141120000, while the sum is 62.

The spelling of 74655855647 in words is "seventy-four billion, six hundred fifty-five million, eight hundred fifty-five thousand, six hundred forty-seven".