1299104434656 has 144 divisors (see below), whose sum is σ = 4325067478368. Its totient is φ = 362119680000.

The previous prime is 1299104434651. The next prime is 1299104434699. The reversal of 1299104434656 is 6564344019921.

1299104434656 is a `hidden beast` number, since 1 + 29 + 91 + 0 + 443 + 46 + 56 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299104434651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7775845 + ... + 7941156.

It is an arithmetic number, because the mean of its divisors is an integer number (30035190822).

Almost surely, 2^{1299104434656} is an apocalyptic number.

1299104434656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1299104434656 is an abundant number, since it is smaller than the sum of its proper divisors (3025963043712).

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

1299104434656 is a wasteful number, since it uses less digits than its factorization.

1299104434656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15717065 (or 15717054 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 1299104434656 in words is "one trillion, two hundred ninety-nine billion, one hundred four million, four hundred thirty-four thousand, six hundred fifty-six".