251416325389 has 2 divisors, whose sum is σ = 251416325390. Its totient is φ = 251416325388.

The previous prime is 251416325351. The next prime is 251416325399. The reversal of 251416325389 is 983523614152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 251406974025 + 9351364 = 501405^2 + 3058^2 .

It is a cyclic number.

It is not a de Polignac number, because 251416325389 - 2⁷ = 251416325261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251416325309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125708162694 + 125708162695.

It is an arithmetic number, because the mean of its divisors is an integer number (125708162695).

Almost surely, 2^251416325389 is an apocalyptic number.

It is an amenable number.

251416325389 is a deficient number, since it is larger than the sum of its proper divisors (1).

251416325389 is an equidigital number, since it uses as much as digits as its factorization.

251416325389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1555200, while the sum is 49.

The spelling of 251416325389 in words is "two hundred fifty-one billion, four hundred sixteen million, three hundred twenty-five thousand, three hundred eighty-nine".