79216915919 has 4 divisors (see below), whose sum is σ = 79410600720. Its totient is φ = 79023231120.

The previous prime is 79216915903. The next prime is 79216915933. The reversal of 79216915919 is 91951961297.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91951961297 = 7 ⋅13135994471.

It is a cyclic number.

It is not a de Polignac number, because 79216915919 - 2⁴ = 79216915903 is a prime.

It is a super-2 number, since 2×79216915919² (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 (79216915949) 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, 96841787 + ... + 96842604.

It is an arithmetic number, because the mean of its divisors is an integer number (19852650180).

Almost surely, 2^79216915919 is an apocalyptic number.

79216915919 is a deficient number, since it is larger than the sum of its proper divisors (193684801).

79216915919 is a wasteful number, since it uses less digits than its factorization.

79216915919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193684800.

The product of its digits is 2755620, while the sum is 59.

The spelling of 79216915919 in words is "seventy-nine billion, two hundred sixteen million, nine hundred fifteen thousand, nine hundred nineteen".