79701779737 has 4 divisors (see below), whose sum is σ = 79834838400. Its totient is φ = 79568721076.

The previous prime is 79701779713. The next prime is 79701779749. The reversal of 79701779737 is 73797710797.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73797710797 = 431 ⋅171224387.

It is a cyclic number.

It is not a de Polignac number, because 79701779737 - 2¹⁹ = 79701255449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79701779767) 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, 66528433 + ... + 66529630.

It is an arithmetic number, because the mean of its divisors is an integer number (19958709600).

Almost surely, 2^79701779737 is an apocalyptic number.

It is an amenable number.

79701779737 is a deficient number, since it is larger than the sum of its proper divisors (133058663).

79701779737 is a wasteful number, since it uses less digits than its factorization.

79701779737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133058662.

The product of its (nonzero) digits is 28588707, while the sum is 64.

The spelling of 79701779737 in words is "seventy-nine billion, seven hundred one million, seven hundred seventy-nine thousand, seven hundred thirty-seven".