78348344399 has 24 divisors (see below), whose sum is σ = 85220611200. Its totient is φ = 71996895360.

The previous prime is 78348344381. The next prime is 78348344401. The reversal of 78348344399 is 99344384387.

It is not a de Polignac number, because 78348344399 - 2³² = 74053377103 is a prime.

It is a super-2 number, since 2×78348344399² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78348344339) 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, 43793597 + ... + 43795385.

It is an arithmetic number, because the mean of its divisors is an integer number (3550858800).

Almost surely, 2^78348344399 is an apocalyptic number.

78348344399 is a deficient number, since it is larger than the sum of its proper divisors (6872266801).

78348344399 is a wasteful number, since it uses less digits than its factorization.

78348344399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2835 (or 2822 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 62.

The spelling of 78348344399 in words is "seventy-eight billion, three hundred forty-eight million, three hundred forty-four thousand, three hundred ninety-nine".