1251798566983 has 16 divisors (see below), whose sum is σ = 1325346976800. Its totient is φ = 1180287037440.

The previous prime is 1251798566947. The next prime is 1251798567073. The reversal of 1251798566983 is 3896658971521.

It is a cyclic number.

It is not a de Polignac number, because 1251798566983 - 2¹⁷ = 1251798435911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251798536983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6237223 + ... + 6434791.

It is an arithmetic number, because the mean of its divisors is an integer number (82834186050).

Almost surely, 2^{1251798566983} is an apocalyptic number.

1251798566983 is a deficient number, since it is larger than the sum of its proper divisors (73548409817).

1251798566983 is a wasteful number, since it uses less digits than its factorization.

1251798566983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202722.

The product of its digits is 195955200, while the sum is 70.

The spelling of 1251798566983 in words is "one trillion, two hundred fifty-one billion, seven hundred ninety-eight million, five hundred sixty-six thousand, nine hundred eighty-three".