1272691981358 has 48 divisors (see below), whose sum is σ = 2288838991824. Its totient is φ = 528871109760.

The previous prime is 1272691981357. The next prime is 1272691981411. The reversal of 1272691981358 is 8531891962721.

It is a super-3 number, since 3×1272691981358³ (a number of 37 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1272691981358.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272691981357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 316685 + ... + 1626552.

It is an arithmetic number, because the mean of its divisors is an integer number (47684145663).

Almost surely, 2^{1272691981358} is an apocalyptic number.

1272691981358 is a deficient number, since it is larger than the sum of its proper divisors (1016147010466).

1272691981358 is a wasteful number, since it uses less digits than its factorization.

1272691981358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943457 (or 1943450 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 62.

The spelling of 1272691981358 in words is "one trillion, two hundred seventy-two billion, six hundred ninety-one million, nine hundred eighty-one thousand, three hundred fifty-eight".