251061125999 has 2 divisors, whose sum is σ = 251061126000. Its totient is φ = 251061125998.

The previous prime is 251061125951. The next prime is 251061126091. The reversal of 251061125999 is 999521160152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 251061125999 - 2²⁰ = 251060077423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251061125929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125530562999 + 125530563000.

It is an arithmetic number, because the mean of its divisors is an integer number (125530563000).

Almost surely, 2^251061125999 is an apocalyptic number.

251061125999 is a deficient number, since it is larger than the sum of its proper divisors (1).

251061125999 is an equidigital number, since it uses as much as digits as its factorization.

251061125999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 437400, while the sum is 50.

The spelling of 251061125999 in words is "two hundred fifty-one billion, sixty-one million, one hundred twenty-five thousand, nine hundred ninety-nine".