1251802091383 has 2 divisors, whose sum is σ = 1251802091384. Its totient is φ = 1251802091382.

The previous prime is 1251802091377. The next prime is 1251802091509. The reversal of 1251802091383 is 3831902081521.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1251802091383 - 2²⁵ = 1251768536951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251802091083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625901045691 + 625901045692.

It is an arithmetic number, because the mean of its divisors is an integer number (625901045692).

Almost surely, 2^{1251802091383} is an apocalyptic number.

1251802091383 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251802091383 is an equidigital number, since it uses as much as digits as its factorization.

1251802091383 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 1251802091383 in words is "one trillion, two hundred fifty-one billion, eight hundred two million, ninety-one thousand, three hundred eighty-three".