78447068277 has 32 divisors (see below), whose sum is σ = 110613135360. Its totient is φ = 49355127360.

The previous prime is 78447068269. The next prime is 78447068281. The reversal of 78447068277 is 77286074487.

It is not a de Polignac number, because 78447068277 - 2³ = 78447068269 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78447068277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78447068257) 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, 1561374 + ... + 1610832.

It is an arithmetic number, because the mean of its divisors is an integer number (3456660480).

Almost surely, 2^78447068277 is an apocalyptic number.

It is an amenable number.

78447068277 is a deficient number, since it is larger than the sum of its proper divisors (32166067083).

78447068277 is a wasteful number, since it uses less digits than its factorization.

78447068277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49793.

The product of its (nonzero) digits is 29503488, while the sum is 60.

The spelling of 78447068277 in words is "seventy-eight billion, four hundred forty-seven million, sixty-eight thousand, two hundred seventy-seven".