78749665630 has 8 divisors (see below), whose sum is σ = 141749398152. Its totient is φ = 31499866248.

The previous prime is 78749665627. The next prime is 78749665633. The reversal of 78749665630 is 3656694787.

It is an interprime number because it is at equal distance from previous prime (78749665627) and next prime (78749665633).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78749665633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3937483272 + ... + 3937483291.

It is an arithmetic number, because the mean of its divisors is an integer number (17718674769).

Almost surely, 2^78749665630 is an apocalyptic number.

78749665630 is a deficient number, since it is larger than the sum of its proper divisors (62999732522).

78749665630 is a wasteful number, since it uses less digits than its factorization.

78749665630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7874966570.

The product of its (nonzero) digits is 45722880, while the sum is 61.

The spelling of 78749665630 in words is "seventy-eight billion, seven hundred forty-nine million, six hundred sixty-five thousand, six hundred thirty".