78779750730 has 64 divisors (see below), whose sum is σ = 199057305600. Its totient is φ = 19898775360.

The previous prime is 78779750669. The next prime is 78779750737. The reversal of 78779750730 is 3705797787.

It is not an unprimeable number, because it can be changed into a prime (78779750737) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5304415 + ... + 5319245.

It is an arithmetic number, because the mean of its divisors is an integer number (3110270400).

Almost surely, 2^78779750730 is an apocalyptic number.

78779750730 is an abundant number, since it is smaller than the sum of its proper divisors (120277554870).

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

78779750730 is a wasteful number, since it uses less digits than its factorization.

78779750730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24179.

The product of its (nonzero) digits is 18151560, while the sum is 60.

The spelling of 78779750730 in words is "seventy-eight billion, seven hundred seventy-nine million, seven hundred fifty thousand, seven hundred thirty".