78832916909 has 4 divisors (see below), whose sum is σ = 78972940416. Its totient is φ = 78692893404.

The previous prime is 78832916861. The next prime is 78832916933. The reversal of 78832916909 is 90961923887.

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: 90961923887 = 32051 ⋅2838037.

It is a cyclic number.

It is not a de Polignac number, because 78832916909 - 2¹⁶ = 78832851373 is a prime.

It is a super-2 number, since 2×78832916909² (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 (78832916959) 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, 70010909 + ... + 70012034.

It is an arithmetic number, because the mean of its divisors is an integer number (19743235104).

Almost surely, 2^78832916909 is an apocalyptic number.

It is an amenable number.

78832916909 is a deficient number, since it is larger than the sum of its proper divisors (140023507).

78832916909 is a wasteful number, since it uses less digits than its factorization.

78832916909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140023506.

The product of its (nonzero) digits is 11757312, while the sum is 62.

The spelling of 78832916909 in words is "seventy-eight billion, eight hundred thirty-two million, nine hundred sixteen thousand, nine hundred nine".