1251966799424 has 28 divisors (see below), whose sum is σ = 2710223584368. Its totient is φ = 569075817600.

The previous prime is 1251966799423. The next prime is 1251966799429. The reversal of 1251966799424 is 4249976691521.

It is not an unprimeable number, because it can be changed into a prime (1251966799423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 889180262 + ... + 889181669.

Almost surely, 2^{1251966799424} is an apocalyptic number.

It is an amenable number.

1251966799424 is an abundant number, since it is smaller than the sum of its proper divisors (1458256784944).

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

1251966799424 is a wasteful number, since it uses less digits than its factorization.

1251966799424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778361954 (or 1778361944 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 65.

The spelling of 1251966799424 in words is "one trillion, two hundred fifty-one billion, nine hundred sixty-six million, seven hundred ninety-nine thousand, four hundred twenty-four".