244040015581 has 2 divisors, whose sum is σ = 244040015582. Its totient is φ = 244040015580.

The previous prime is 244040015567. The next prime is 244040015627. The reversal of 244040015581 is 185510040442.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182183848900 + 61856166681 = 426830^2 + 248709^2 .

It is a cyclic number.

It is not a de Polignac number, because 244040015581 - 2⁹ = 244040015069 is a prime.

It is a super-2 number, since 2×244040015581² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (244040015501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122020007790 + 122020007791.

It is an arithmetic number, because the mean of its divisors is an integer number (122020007791).

Almost surely, 2^244040015581 is an apocalyptic number.

It is an amenable number.

244040015581 is a deficient number, since it is larger than the sum of its proper divisors (1).

244040015581 is an equidigital number, since it uses as much as digits as its factorization.

244040015581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25600, while the sum is 34.

The spelling of 244040015581 in words is "two hundred forty-four billion, forty million, fifteen thousand, five hundred eighty-one".