78477078547 has 8 divisors (see below), whose sum is σ = 89691509600. Its totient is φ = 67263502464.

The previous prime is 78477078521. The next prime is 78477078557. The reversal of 78477078547 is 74587077487.

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

It is a cyclic number.

It is not a de Polignac number, because 78477078547 - 2¹¹ = 78477076499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78477078517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3222 + ... + 396187.

It is an arithmetic number, because the mean of its divisors is an integer number (11211438700).

Almost surely, 2^78477078547 is an apocalyptic number.

78477078547 is a deficient number, since it is larger than the sum of its proper divisors (11214431053).

78477078547 is a wasteful number, since it uses less digits than its factorization.

78477078547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427485.

The product of its (nonzero) digits is 86051840, while the sum is 64.

The spelling of 78477078547 in words is "seventy-eight billion, four hundred seventy-seven million, seventy-eight thousand, five hundred forty-seven".