78413923775 has 24 divisors (see below), whose sum is σ = 106685854704. Its totient is φ = 56698630400.

The previous prime is 78413923751. The next prime is 78413923781. The reversal of 78413923775 is 57732931487.

It is a happy number.

It is not a de Polignac number, because 78413923775 - 2⁸ = 78413923519 is a prime.

It is a super-2 number, since 2×78413923775² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78413923775.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 776534 + ... + 871683.

It is an arithmetic number, because the mean of its divisors is an integer number (4445243946).

Almost surely, 2^78413923775 is an apocalyptic number.

78413923775 is a deficient number, since it is larger than the sum of its proper divisors (28271930929).

78413923775 is a wasteful number, since it uses less digits than its factorization.

78413923775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648411 (or 1648406 counting only the distinct ones).

The product of its digits is 8890560, while the sum is 56.

The spelling of 78413923775 in words is "seventy-eight billion, four hundred thirteen million, nine hundred twenty-three thousand, seven hundred seventy-five".