79775455851 has 48 divisors (see below), whose sum is σ = 147075778304. Its totient is φ = 42079349664.

The previous prime is 79775455843. The next prime is 79775455853. The reversal of 79775455851 is 15855457797.

It is a happy number.

79775455851 is a `hidden beast` number, since 7 + 9 + 7 + 7 + 5 + 45 + 585 + 1 = 666.

It is not a de Polignac number, because 79775455851 - 2³ = 79775455843 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (79775455853) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1781701 + ... + 1825926.

Almost surely, 2^79775455851 is an apocalyptic number.

79775455851 is a deficient number, since it is larger than the sum of its proper divisors (67300322453).

79775455851 is a wasteful number, since it uses less digits than its factorization.

79775455851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3607662 (or 3607650 counting only the distinct ones).

The product of its digits is 61740000, while the sum is 63.

The spelling of 79775455851 in words is "seventy-nine billion, seven hundred seventy-five million, four hundred fifty-five thousand, eight hundred fifty-one".