1209977576864 has 72 divisors (see below), whose sum is σ = 2845958495940. Its totient is φ = 504546610176.

The previous prime is 1209977576849. The next prime is 1209977576891. The reversal of 1209977576864 is 4686757799021.

It can be written as a sum of positive squares in 2 ways, for example, as 1033695157264 + 176282419600 = 1016708^2 + 419860^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10369949 + ... + 10485980.

Almost surely, 2^{1209977576864} is an apocalyptic number.

1209977576864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1209977576864 is an abundant number, since it is smaller than the sum of its proper divisors (1635980919076).

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

1209977576864 is a wasteful number, since it uses less digits than its factorization.

1209977576864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20855990 (or 20855975 counting only the distinct ones).

The product of its (nonzero) digits is 320060160, while the sum is 71.

The spelling of 1209977576864 in words is "one trillion, two hundred nine billion, nine hundred seventy-seven million, five hundred seventy-six thousand, eight hundred sixty-four".