13120777832 has 8 divisors (see below), whose sum is σ = 24601458450. Its totient is φ = 6560388912.

The previous prime is 13120777793. The next prime is 13120777897. The reversal of 13120777832 is 23877702131.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10591291396 + 2529486436 = 102914^2 + 50294^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 13120777832.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820048607 + ... + 820048622.

Almost surely, 2^13120777832 is an apocalyptic number.

It is an amenable number.

13120777832 is a deficient number, since it is larger than the sum of its proper divisors (11480680618).

13120777832 is a wasteful number, since it uses less digits than its factorization.

13120777832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640097235 (or 1640097231 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 41.

The spelling of 13120777832 in words is "thirteen billion, one hundred twenty million, seven hundred seventy-seven thousand, eight hundred thirty-two".