79557148887 has 4 divisors (see below), whose sum is σ = 106076198520. Its totient is φ = 53038099256.

The previous prime is 79557148883. The next prime is 79557148919. The reversal of 79557148887 is 78884175597.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79557148887 - 2² = 79557148883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79557148883) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 13259524812 + ... + 13259524817.

It is an arithmetic number, because the mean of its divisors is an integer number (26519049630).

Almost surely, 2^79557148887 is an apocalyptic number.

79557148887 is a deficient number, since it is larger than the sum of its proper divisors (26519049633).

79557148887 is a wasteful number, since it uses less digits than its factorization.

79557148887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26519049632.

The product of its digits is 158054400, while the sum is 69.

The spelling of 79557148887 in words is "seventy-nine billion, five hundred fifty-seven million, one hundred forty-eight thousand, eight hundred eighty-seven".