251352586561 has 2 divisors, whose sum is σ = 251352586562. Its totient is φ = 251352586560.

The previous prime is 251352586547. The next prime is 251352586579. The reversal of 251352586561 is 165685253152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237597753600 + 13754832961 = 487440^2 + 117281^2 .

It is a cyclic number.

It is not a de Polignac number, because 251352586561 - 2¹³ = 251352578369 is a prime.

It is not a weakly prime, because it can be changed into another prime (251352583561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125676293280 + 125676293281.

It is an arithmetic number, because the mean of its divisors is an integer number (125676293281).

Almost surely, 2^251352586561 is an apocalyptic number.

It is an amenable number.

251352586561 is a deficient number, since it is larger than the sum of its proper divisors (1).

251352586561 is an equidigital number, since it uses as much as digits as its factorization.

251352586561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160000, while the sum is 49.

The spelling of 251352586561 in words is "two hundred fifty-one billion, three hundred fifty-two million, five hundred eighty-six thousand, five hundred sixty-one".