1265191377996 has 72 divisors (see below), whose sum is σ = 3698251742640. Its totient is φ = 333676844928.

The previous prime is 1265191377973. The next prime is 1265191377997. The reversal of 1265191377996 is 6997731915621.

It is not an unprimeable number, because it can be changed into a prime (1265191377997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82749511 + ... + 82764798.

Almost surely, 2^{1265191377996} is an apocalyptic number.

It is an amenable number.

1265191377996 is an abundant number, since it is smaller than the sum of its proper divisors (2433060364644).

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

1265191377996 is a wasteful number, since it uses less digits than its factorization.

1265191377996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165514343 (or 165514334 counting only the distinct ones).

The product of its digits is 38578680, while the sum is 66.

The spelling of 1265191377996 in words is "one trillion, two hundred sixty-five billion, one hundred ninety-one million, three hundred seventy-seven thousand, nine hundred ninety-six".