79537455769 has 4 divisors (see below), whose sum is σ = 79540789860. Its totient is φ = 79534121680.

The previous prime is 79537455757. The next prime is 79537455791. The reversal of 79537455769 is 96755473597.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96755473597 = 135043 ⋅716479.

It can be written as a sum of positive squares in 2 ways, for example, as 62143011225 + 17394444544 = 249285^2 + 131888^2 .

It is a cyclic number.

It is not a de Polignac number, because 79537455769 - 2¹⁷ = 79537324697 is a prime.

It is a super-2 number, since 2×79537455769² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79537455719) 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, 1631002 + ... + 1679059.

It is an arithmetic number, because the mean of its divisors is an integer number (19885197465).

Almost surely, 2^79537455769 is an apocalyptic number.

It is an amenable number.

79537455769 is a deficient number, since it is larger than the sum of its proper divisors (3334091).

79537455769 is a wasteful number, since it uses less digits than its factorization.

79537455769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3334090.

The product of its digits is 250047000, while the sum is 67.

The spelling of 79537455769 in words is "seventy-nine billion, five hundred thirty-seven million, four hundred fifty-five thousand, seven hundred sixty-nine".