1273791409738 has 16 divisors (see below), whose sum is σ = 1993814346816. Its totient is φ = 609188124160.

The previous prime is 1273791409711. The next prime is 1273791409739. The reversal of 1273791409738 is 8379041973721.

It is not an unprimeable number, because it can be changed into a prime (1273791409739) 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 7 ways as a sum of consecutive naturals, for example, 1441245 + ... + 2150527.

It is an arithmetic number, because the mean of its divisors is an integer number (124613396676).

Almost surely, 2^{1273791409738} is an apocalyptic number.

1273791409738 is a deficient number, since it is larger than the sum of its proper divisors (720022937078).

1273791409738 is a wasteful number, since it uses less digits than its factorization.

1273791409738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748349.

The product of its (nonzero) digits is 16003008, while the sum is 61.

The spelling of 1273791409738 in words is "one trillion, two hundred seventy-three billion, seven hundred ninety-one million, four hundred nine thousand, seven hundred thirty-eight".