79955747225478 has 20 divisors (see below), whose sum is σ = 179160100264860. Its totient is φ = 26651915741772.

The previous prime is 79955747225411. The next prime is 79955747225491. The reversal of 79955747225478 is 87452274755997.

79955747225478 is a `hidden beast` number, since 7 + 9 + 9 + 5 + 5 + 7 + 47 + 22 + 547 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a junction number, because it is equal to n+sod(n) for n = 79955747225397 and 79955747225406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 246776997448 + ... + 246776997771.

It is an arithmetic number, because the mean of its divisors is an integer number (8958005013243).

Almost surely, 2^{79955747225478} is an apocalyptic number.

79955747225478 is an abundant number, since it is smaller than the sum of its proper divisors (99204353039382).

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

79955747225478 is a wasteful number, since it uses less digits than its factorization.

79955747225478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493553995233 (or 493553995224 counting only the distinct ones).

The product of its digits is 12446784000, while the sum is 81.

The spelling of 79955747225478 in words is "seventy-nine trillion, nine hundred fifty-five billion, seven hundred forty-seven million, two hundred twenty-five thousand, four hundred seventy-eight".