79537016693 has 4 divisors (see below), whose sum is σ = 79884340140. Its totient is φ = 79189693248.

The previous prime is 79537016683. The next prime is 79537016719. The reversal of 79537016693 is 39661073597.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 46217260324 + 33319756369 = 214982^2 + 182537^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79537016693 is a prime.

It is a super-2 number, since 2×79537016693² (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 (79537016633) 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, 173661380 + ... + 173661837.

It is an arithmetic number, because the mean of its divisors is an integer number (19971085035).

Almost surely, 2^79537016693 is an apocalyptic number.

It is an amenable number.

79537016693 is a deficient number, since it is larger than the sum of its proper divisors (347323447).

79537016693 is a wasteful number, since it uses less digits than its factorization.

79537016693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347323446.

The product of its (nonzero) digits is 6429780, while the sum is 56.

The spelling of 79537016693 in words is "seventy-nine billion, five hundred thirty-seven million, sixteen thousand, six hundred ninety-three".