1251251388847 has 2 divisors, whose sum is σ = 1251251388848. Its totient is φ = 1251251388846.

The previous prime is 1251251388839. The next prime is 1251251388857. The reversal of 1251251388847 is 7488831521521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1251251388847 - 2³ = 1251251388839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251251388817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625625694423 + 625625694424.

It is an arithmetic number, because the mean of its divisors is an integer number (625625694424).

Almost surely, 2^{1251251388847} is an apocalyptic number.

1251251388847 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251251388847 is an equidigital number, since it uses as much as digits as its factorization.

1251251388847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4300800, while the sum is 55.

The spelling of 1251251388847 in words is "one trillion, two hundred fifty-one billion, two hundred fifty-one million, three hundred eighty-eight thousand, eight hundred forty-seven".