79157645503 has 4 divisors (see below), whose sum is σ = 82599282288. Its totient is φ = 75716008720.

The previous prime is 79157645471. The next prime is 79157645561. The reversal of 79157645503 is 30554675197.

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 79157645503 - 2⁵ = 79157645471 is a prime.

It is a super-2 number, since 2×79157645503² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79157645563) 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, 1720818358 + ... + 1720818403.

It is an arithmetic number, because the mean of its divisors is an integer number (20649820572).

Almost surely, 2^79157645503 is an apocalyptic number.

79157645503 is a deficient number, since it is larger than the sum of its proper divisors (3441636785).

79157645503 is a wasteful number, since it uses less digits than its factorization.

79157645503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3441636784.

The product of its (nonzero) digits is 3969000, while the sum is 52.

The spelling of 79157645503 in words is "seventy-nine billion, one hundred fifty-seven million, six hundred forty-five thousand, five hundred three".