1272561403494 has 16 divisors (see below), whose sum is σ = 2546278132032. Its totient is φ = 423994580328.

The previous prime is 1272561403493. The next prime is 1272561403511. The reversal of 1272561403494 is 4943041652721.

It is a super-3 number, since 3×1272561403494³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272561403493) 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, 48124224 + ... + 48150659.

It is an arithmetic number, because the mean of its divisors is an integer number (159142383252).

Almost surely, 2^{1272561403494} is an apocalyptic number.

1272561403494 is an abundant number, since it is smaller than the sum of its proper divisors (1273716728538).

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

1272561403494 is a wasteful number, since it uses less digits than its factorization.

1272561403494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96277091.

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 1272561403494 in words is "one trillion, two hundred seventy-two billion, five hundred sixty-one million, four hundred three thousand, four hundred ninety-four".