79099566545638 has 4 divisors (see below), whose sum is σ = 118649349818460. Its totient is φ = 39549783272818.

The previous prime is 79099566545627. The next prime is 79099566545683. The reversal of 79099566545638 is 83654566599097.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19774891636408 + ... + 19774891636411.

It is an arithmetic number, because the mean of its divisors is an integer number (29662337454615).

Almost surely, 2^{79099566545638} is an apocalyptic number.

79099566545638 is a deficient number, since it is larger than the sum of its proper divisors (39549783272822).

79099566545638 is a wasteful number, since it uses less digits than its factorization.

79099566545638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39549783272821.

The product of its (nonzero) digits is 13226976000, while the sum is 82.

The spelling of 79099566545638 in words is "seventy-nine trillion, ninety-nine billion, five hundred sixty-six million, five hundred forty-five thousand, six hundred thirty-eight".