77243000013 has 24 divisors (see below), whose sum is σ = 114607654200. Its totient is φ = 50095286784.

The previous prime is 77242999993. The next prime is 77243000027. The reversal of 77243000013 is 31000034277.

It can be written as a sum of positive squares in 4 ways, for example, as 34028074089 + 43214925924 = 184467^2 + 207882^2 .

It is not a de Polignac number, because 77243000013 - 2⁶ = 77242999949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77243000413) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2491753 + ... + 2522561.

It is an arithmetic number, because the mean of its divisors is an integer number (4775318925).

Almost surely, 2^77243000013 is an apocalyptic number.

It is an amenable number.

77243000013 is a deficient number, since it is larger than the sum of its proper divisors (37364654187).

77243000013 is a wasteful number, since it uses less digits than its factorization.

77243000013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38381 (or 38378 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The spelling of 77243000013 in words is "seventy-seven billion, two hundred forty-three million, thirteen", and thus it is an aban number.