79537838551 has 4 divisors (see below), whose sum is σ = 83724040600. Its totient is φ = 75351636504.

The previous prime is 79537838543. The next prime is 79537838561. The reversal of 79537838551 is 15583873597.

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 79537838551 - 2³ = 79537838543 is a prime.

It is a super-2 number, since 2×79537838551² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79537838551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79537838561) 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, 2093100996 + ... + 2093101033.

It is an arithmetic number, because the mean of its divisors is an integer number (20931010150).

Almost surely, 2^79537838551 is an apocalyptic number.

79537838551 is a deficient number, since it is larger than the sum of its proper divisors (4186202049).

79537838551 is a wasteful number, since it uses less digits than its factorization.

79537838551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4186202048.

The product of its digits is 31752000, while the sum is 61.

The spelling of 79537838551 in words is "seventy-nine billion, five hundred thirty-seven million, eight hundred thirty-eight thousand, five hundred fifty-one".