79643357445 has 16 divisors (see below), whose sum is σ = 134136181440. Its totient is φ = 40240854144.

The previous prime is 79643357413. The next prime is 79643357447. The reversal of 79643357445 is 54475334697.

It is a happy number.

It is not a de Polignac number, because 79643357445 - 2⁵ = 79643357413 is a prime.

It is a super-2 number, since 2×79643357445² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79643357447) 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, 139724904 + ... + 139725473.

It is an arithmetic number, because the mean of its divisors is an integer number (8383511340).

Almost surely, 2^79643357445 is an apocalyptic number.

It is an amenable number.

79643357445 is a deficient number, since it is larger than the sum of its proper divisors (54492823995).

79643357445 is a wasteful number, since it uses less digits than its factorization.

79643357445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279450404.

The product of its digits is 38102400, while the sum is 57.

The spelling of 79643357445 in words is "seventy-nine billion, six hundred forty-three million, three hundred fifty-seven thousand, four hundred forty-five".