1291770249768 has 32 divisors (see below), whose sum is σ = 3588250694400. Its totient is φ = 430590083184.

The previous prime is 1291770249751. The next prime is 1291770249773. The reversal of 1291770249768 is 8679420771921.

1291770249768 is a `hidden beast` number, since 1 + 2 + 9 + 17 + 70 + 2 + 497 + 68 = 666.

It is a super-2 number, since 2×1291770249768² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2990208696 + ... + 2990209127.

It is an arithmetic number, because the mean of its divisors is an integer number (112132834200).

Almost surely, 2^{1291770249768} is an apocalyptic number.

1291770249768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1291770249768 is an abundant number, since it is smaller than the sum of its proper divisors (2296480444632).

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

1291770249768 is a wasteful number, since it uses less digits than its factorization.

1291770249768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5980417838 (or 5980417828 counting only the distinct ones).

The product of its (nonzero) digits is 21337344, while the sum is 63.

The spelling of 1291770249768 in words is "one trillion, two hundred ninety-one billion, seven hundred seventy million, two hundred forty-nine thousand, seven hundred sixty-eight".