78105977369 has 16 divisors (see below), whose sum is σ = 94553463168. Its totient is φ = 62984086272.

The previous prime is 78105977359. The next prime is 78105977377. The reversal of 78105977369 is 96377950187.

It is a cyclic number.

It is not a de Polignac number, because 78105977369 - 2⁸ = 78105977113 is a prime.

It is a super-2 number, since 2×78105977369² (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 (78105977359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160547 + ... + 426599.

It is an arithmetic number, because the mean of its divisors is an integer number (5909591448).

Almost surely, 2^78105977369 is an apocalyptic number.

It is an amenable number.

78105977369 is a deficient number, since it is larger than the sum of its proper divisors (16447485799).

78105977369 is a wasteful number, since it uses less digits than its factorization.

78105977369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268544.

The product of its (nonzero) digits is 20003760, while the sum is 62.

The spelling of 78105977369 in words is "seventy-eight billion, one hundred five million, nine hundred seventy-seven thousand, three hundred sixty-nine".