78379775810 has 64 divisors (see below), whose sum is σ = 166852120320. Its totient is φ = 25938044160.

The previous prime is 78379775779. The next prime is 78379775849. The reversal of 78379775810 is 1857797387.

It is a happy number.

It is a super-2 number, since 2×78379775810² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11906720 + ... + 11913300.

It is an arithmetic number, because the mean of its divisors is an integer number (2607064380).

Almost surely, 2^78379775810 is an apocalyptic number.

78379775810 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78379775810 is an abundant number, since it is smaller than the sum of its proper divisors (88472344510).

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

78379775810 is a wasteful number, since it uses less digits than its factorization.

78379775810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12491.

The product of its (nonzero) digits is 20744640, while the sum is 62.

The spelling of 78379775810 in words is "seventy-eight billion, three hundred seventy-nine million, seven hundred seventy-five thousand, eight hundred ten".