79415891478 has 128 divisors (see below), whose sum is σ = 231607296000. Its totient is φ = 19541826720.

The previous prime is 79415891461. The next prime is 79415891531. The reversal of 79415891478 is 87419851497.

79415891478 is a `hidden beast` number, since 7 + 9 + 4 + 1 + 589 + 1 + 47 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 423618 + ... + 581621.

It is an arithmetic number, because the mean of its divisors is an integer number (1809432000).

Almost surely, 2^79415891478 is an apocalyptic number.

79415891478 is an abundant number, since it is smaller than the sum of its proper divisors (152191404522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79415891478 is a wasteful number, since it uses less digits than its factorization.

79415891478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005287 (or 1005281 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 63.

The spelling of 79415891478 in words is "seventy-nine billion, four hundred fifteen million, eight hundred ninety-one thousand, four hundred seventy-eight".