77792748705 has 80 divisors (see below), whose sum is σ = 167760362880. Its totient is φ = 33690670848.

The previous prime is 77792748703. The next prime is 77792748773. The reversal of 77792748705 is 50784729777.

It is not a de Polignac number, because 77792748705 - 2¹ = 77792748703 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (77792748703) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 668244 + ... + 775973.

It is an arithmetic number, because the mean of its divisors is an integer number (2097004536).

Almost surely, 2^77792748705 is an apocalyptic number.

It is an amenable number.

77792748705 is an abundant number, since it is smaller than the sum of its proper divisors (89967614175).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77792748705 is a wasteful number, since it uses less digits than its factorization.

77792748705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444260 (or 1444251 counting only the distinct ones).

The product of its (nonzero) digits is 48404160, while the sum is 63.

The spelling of 77792748705 in words is "seventy-seven billion, seven hundred ninety-two million, seven hundred forty-eight thousand, seven hundred five".