205157623079 has 4 divisors (see below), whose sum is σ = 205182999984. Its totient is φ = 205132246176.

The previous prime is 205157623061. The next prime is 205157623081. The reversal of 205157623079 is 970326751502.

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 205157623079 - 2³² = 200862655783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205157623039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12676322 + ... + 12692495.

It is an arithmetic number, because the mean of its divisors is an integer number (51295749996).

Almost surely, 2^205157623079 is an apocalyptic number.

205157623079 is a deficient number, since it is larger than the sum of its proper divisors (25376905).

205157623079 is an equidigital number, since it uses as much as digits as its factorization.

205157623079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25376904.

The product of its (nonzero) digits is 793800, while the sum is 47.

The spelling of 205157623079 in words is "two hundred five billion, one hundred fifty-seven million, six hundred twenty-three thousand, seventy-nine".