1272991344774 has 16 divisors (see below), whose sum is σ = 2550177067008. Its totient is φ = 423631385352.

The previous prime is 1272991344773. The next prime is 1272991344869. The reversal of 1272991344774 is 4774431992721.

It is a happy number.

It is a super-2 number, since 2×1272991344774² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272991344773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174761782 + ... + 174769065.

It is an arithmetic number, because the mean of its divisors is an integer number (159386066688).

Almost surely, 2^{1272991344774} is an apocalyptic number.

1272991344774 is an abundant number, since it is smaller than the sum of its proper divisors (1277185722234).

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

1272991344774 is a wasteful number, since it uses less digits than its factorization.

1272991344774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349531459.

The product of its digits is 21337344, while the sum is 60.

The spelling of 1272991344774 in words is "one trillion, two hundred seventy-two billion, nine hundred ninety-one million, three hundred forty-four thousand, seven hundred seventy-four".