69679778976 has 144 divisors (see below), whose sum is σ = 209988762984. Its totient is φ = 21841477632.

The previous prime is 69679778963. The next prime is 69679778981. The reversal of 69679778976 is 67987797696.

It can be written as a sum of positive squares in 4 ways, for example, as 68089683600 + 1590095376 = 260940^2 + 39876^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a junction number, because it is equal to n+sod(n) for n = 69679778895 and 69679778904.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6344626 + ... + 6355598.

Almost surely, 2^69679778976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69679778976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104994381492).

69679778976 is an abundant number, since it is smaller than the sum of its proper divisors (140308984008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

69679778976 is a wasteful number, since it uses less digits than its factorization.

69679778976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12303 (or 12292 counting only the distinct ones).

The product of its digits is 3024568512, while the sum is 81.

The spelling of 69679778976 in words is "sixty-nine billion, six hundred seventy-nine million, seven hundred seventy-eight thousand, nine hundred seventy-six".