78770972269 has 4 divisors (see below), whose sum is σ = 85931969760. Its totient is φ = 71609974780.

The previous prime is 78770972261. The next prime is 78770972303. The reversal of 78770972269 is 96227907787.

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.

It is a cyclic number.

It is not a de Polignac number, because 78770972269 - 2³ = 78770972261 is a prime.

It is a super-2 number, since 2×78770972269² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78770972269.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78770972261) 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, 3580498729 + ... + 3580498750.

It is an arithmetic number, because the mean of its divisors is an integer number (21482992440).

Almost surely, 2^78770972269 is an apocalyptic number.

It is an amenable number.

78770972269 is a deficient number, since it is larger than the sum of its proper divisors (7160997491).

78770972269 is a wasteful number, since it uses less digits than its factorization.

78770972269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7160997490.

The product of its (nonzero) digits is 37340352, while the sum is 64.

The spelling of 78770972269 in words is "seventy-eight billion, seven hundred seventy million, nine hundred seventy-two thousand, two hundred sixty-nine".