77993243093 has 32 divisors (see below), whose sum is σ = 87342925824. Its totient is φ = 69312402432.

The previous prime is 77993243071. The next prime is 77993243101. The reversal of 77993243093 is 39034239977.

It is a cyclic number.

It is not a de Polignac number, because 77993243093 - 2⁸ = 77993242837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77993243033) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4237196 + ... + 4255562.

It is an arithmetic number, because the mean of its divisors is an integer number (2729466432).

Almost surely, 2^77993243093 is an apocalyptic number.

It is an amenable number.

77993243093 is a deficient number, since it is larger than the sum of its proper divisors (9349682731).

77993243093 is a wasteful number, since it uses less digits than its factorization.

77993243093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18621.

The product of its (nonzero) digits is 7715736, while the sum is 56.

The spelling of 77993243093 in words is "seventy-seven billion, nine hundred ninety-three million, two hundred forty-three thousand, ninety-three".