77418538893 has 6 divisors (see below), whose sum is σ = 111826778414. Its totient is φ = 51612359256.

The previous prime is 77418538861. The next prime is 77418538909. The reversal of 77418538893 is 39883581477.

77418538893 is a `hidden beast` number, since 7 + 7 + 4 + 1 + 8 + 538 + 8 + 93 = 666.

It can be written as a sum of positive squares in only one way, i.e., 70762916169 + 6655622724 = 266013^2 + 81582^2 .

It is not a de Polignac number, because 77418538893 - 2⁵ = 77418538861 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 77418538893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77418538853) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4301029930 + ... + 4301029947.

Almost surely, 2^77418538893 is an apocalyptic number.

It is an amenable number.

77418538893 is a deficient number, since it is larger than the sum of its proper divisors (34408239521).

77418538893 is a wasteful number, since it uses less digits than its factorization.

77418538893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8602059883 (or 8602059880 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 63.

The spelling of 77418538893 in words is "seventy-seven billion, four hundred eighteen million, five hundred thirty-eight thousand, eight hundred ninety-three".