79783550121 has 16 divisors (see below), whose sum is σ = 118517925888. Its totient is φ = 47324864400.

The previous prime is 79783550113. The next prime is 79783550141. The reversal of 79783550121 is 12105538797.

It is not a de Polignac number, because 79783550121 - 2³ = 79783550113 is a prime.

It is a super-2 number, since 2×79783550121² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79783550101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25718485 + ... + 25721586.

It is an arithmetic number, because the mean of its divisors is an integer number (7407370368).

Almost surely, 2^79783550121 is an apocalyptic number.

It is an amenable number.

79783550121 is a deficient number, since it is larger than the sum of its proper divisors (38734375767).

79783550121 is a wasteful number, since it uses less digits than its factorization.

79783550121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51440132.

The product of its (nonzero) digits is 529200, while the sum is 48.

The spelling of 79783550121 in words is "seventy-nine billion, seven hundred eighty-three million, five hundred fifty thousand, one hundred twenty-one".