251178913441 has 2 divisors, whose sum is σ = 251178913442. Its totient is φ = 251178913440.

The previous prime is 251178913373. The next prime is 251178913457. The reversal of 251178913441 is 144319871152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179518300416 + 71660613025 = 423696^2 + 267695^2 .

It is a cyclic number.

It is not a de Polignac number, because 251178913441 - 2¹¹ = 251178911393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 251178913391 and 251178913400.

It is not a weakly prime, because it can be changed into another prime (251178916441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125589456720 + 125589456721.

It is an arithmetic number, because the mean of its divisors is an integer number (125589456721).

Almost surely, 2^251178913441 is an apocalyptic number.

It is an amenable number.

251178913441 is a deficient number, since it is larger than the sum of its proper divisors (1).

251178913441 is an equidigital number, since it uses as much as digits as its factorization.

251178913441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 46.

The spelling of 251178913441 in words is "two hundred fifty-one billion, one hundred seventy-eight million, nine hundred thirteen thousand, four hundred forty-one".