1269452649472 has 66 divisors (see below), whose sum is σ = 2951978466642. Its totient is φ = 544051113984.

The previous prime is 1269452649469. The next prime is 1269452649541. The reversal of 1269452649472 is 2749462549621.

It can be written as a sum of positive squares in only one way, i.e., 784457404416 + 484995245056 = 885696^2 + 696416^2 .

It is a super-2 number, since 2×1269452649472² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (61) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1269452649472.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12599823 + ... + 12700174.

Almost surely, 2^{1269452649472} is an apocalyptic number.

It is an amenable number.

1269452649472 is an abundant number, since it is smaller than the sum of its proper divisors (1682525817170).

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

1269452649472 is an equidigital number, since it uses as much as digits as its factorization.

1269452649472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25300031 (or 25300006 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 61.

The spelling of 1269452649472 in words is "one trillion, two hundred sixty-nine billion, four hundred fifty-two million, six hundred forty-nine thousand, four hundred seventy-two".