78798773978734 has 32 divisors (see below), whose sum is σ = 120923267558400. Its totient is φ = 38493947642592.

The previous prime is 78798773978713. The next prime is 78798773978779. The reversal of 78798773978734 is 43787937789787.

It is a Harshad number since it is a multiple of its sum of digits (94).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 933117117 + ... + 933201559.

It is an arithmetic number, because the mean of its divisors is an integer number (3778852111200).

Almost surely, 2^{78798773978734} is an apocalyptic number.

78798773978734 is a deficient number, since it is larger than the sum of its proper divisors (42124493579666).

78798773978734 is a wasteful number, since it uses less digits than its factorization.

78798773978734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101664.

The product of its digits is 175649015808, while the sum is 94.

The spelling of 78798773978734 in words is "seventy-eight trillion, seven hundred ninety-eight billion, seven hundred seventy-three million, nine hundred seventy-eight thousand, seven hundred thirty-four".