778793148923 has 2 divisors, whose sum is σ = 778793148924. Its totient is φ = 778793148922.

The previous prime is 778793148863. The next prime is 778793148941. The reversal of 778793148923 is 329841397877.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 778793148923 - 2⁸ = 778793148667 is a prime.

It is not a weakly prime, because it can be changed into another prime (778793148323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389396574461 + 389396574462.

It is an arithmetic number, because the mean of its divisors is an integer number (389396574462).

Almost surely, 2^778793148923 is an apocalyptic number.

778793148923 is a deficient number, since it is larger than the sum of its proper divisors (1).

778793148923 is an equidigital number, since it uses as much as digits as its factorization.

778793148923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 128024064, while the sum is 68.

The spelling of 778793148923 in words is "seven hundred seventy-eight billion, seven hundred ninety-three million, one hundred forty-eight thousand, nine hundred twenty-three".