78377468427 has 20 divisors (see below), whose sum is σ = 119291499360. Its totient is φ = 51265762704.

The previous prime is 78377468419. The next prime is 78377468431. The reversal of 78377468427 is 72486477387.

78377468427 is a `hidden beast` number, since 7 + 83 + 7 + 74 + 68 + 427 = 666.

It is not a de Polignac number, because 78377468427 - 2³ = 78377468419 is a prime.

It is a super-2 number, since 2×78377468427² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78377468447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9124227 + ... + 9132812.

It is an arithmetic number, because the mean of its divisors is an integer number (5964574968).

Almost surely, 2^78377468427 is an apocalyptic number.

78377468427 is a deficient number, since it is larger than the sum of its proper divisors (40914030933).

78377468427 is a wasteful number, since it uses less digits than its factorization.

78377468427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18257104 (or 18257095 counting only the distinct ones).

The product of its digits is 88510464, while the sum is 63.

The spelling of 78377468427 in words is "seventy-eight billion, three hundred seventy-seven million, four hundred sixty-eight thousand, four hundred twenty-seven".