1272312749898 has 24 divisors (see below), whose sum is σ = 2901765921600. Its totient is φ = 401782973544.

The previous prime is 1272312749893. The next prime is 1272312749909. The reversal of 1272312749898 is 8989472132721.

1272312749898 is a `hidden beast` number, since 1 + 2 + 7 + 2 + 31 + 27 + 498 + 98 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1272312749893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1860106018 + ... + 1860106701.

It is an arithmetic number, because the mean of its divisors is an integer number (120906913400).

Almost surely, 2^{1272312749898} is an apocalyptic number.

1272312749898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1272312749898 is an abundant number, since it is smaller than the sum of its proper divisors (1629453171702).

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

1272312749898 is a wasteful number, since it uses less digits than its factorization.

1272312749898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3720212746 (or 3720212743 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 63.

The spelling of 1272312749898 in words is "one trillion, two hundred seventy-two billion, three hundred twelve million, seven hundred forty-nine thousand, eight hundred ninety-eight".