78472342655775 has 120 divisors (see below), whose sum is σ = 149891913160704. Its totient is φ = 40563760737600.

The previous prime is 78472342655767. The next prime is 78472342655779. The reversal of 78472342655775 is 57755624327487.

78472342655775 is a `hidden beast` number, since 7 + 8 + 4 + 7 + 2 + 3 + 42 + 6 + 5 + 577 + 5 = 666.

It is not a de Polignac number, because 78472342655775 - 2³ = 78472342655767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78472342655779) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 5800570 + ... + 13805480.

Almost surely, 2^{78472342655775} is an apocalyptic number.

78472342655775 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

78472342655775 is a deficient number, since it is larger than the sum of its proper divisors (71419570504929).

78472342655775 is a wasteful number, since it uses less digits than its factorization.

78472342655775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8005083 (or 8005069 counting only the distinct ones).

The product of its digits is 2765952000, while the sum is 72.

The spelling of 78472342655775 in words is "seventy-eight trillion, four hundred seventy-two billion, three hundred forty-two million, six hundred fifty-five thousand, seven hundred seventy-five".