1321677045756 has 72 divisors (see below), whose sum is σ = 3372094165440. Its totient is φ = 436447564416.

The previous prime is 1321677045721. The next prime is 1321677045779. The reversal of 1321677045756 is 6575407761231.

1321677045756 is a `hidden beast` number, since 1 + 3 + 2 + 1 + 67 + 7 + 0 + 4 + 575 + 6 = 666.

It is a super-2 number, since 2×1321677045756² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 28413990 + ... + 28460466.

Almost surely, 2^{1321677045756} is an apocalyptic number.

It is an amenable number.

1321677045756 is an abundant number, since it is smaller than the sum of its proper divisors (2050417119684).

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

1321677045756 is a wasteful number, since it uses less digits than its factorization.

1321677045756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53843 (or 53838 counting only the distinct ones).

The product of its (nonzero) digits is 7408800, while the sum is 54.

The spelling of 1321677045756 in words is "one trillion, three hundred twenty-one billion, six hundred seventy-seven million, forty-five thousand, seven hundred fifty-six".