40881257513 has 2 divisors, whose sum is σ = 40881257514. Its totient is φ = 40881257512.

The previous prime is 40881257509. The next prime is 40881257591. The reversal of 40881257513 is 31575218804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39240440464 + 1640817049 = 198092^2 + 40507^2 .

It is a cyclic number.

It is not a de Polignac number, because 40881257513 - 2² = 40881257509 is a prime.

It is not a weakly prime, because it can be changed into another prime (40881257503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20440628756 + 20440628757.

It is an arithmetic number, because the mean of its divisors is an integer number (20440628757).

Almost surely, 2^40881257513 is an apocalyptic number.

It is an amenable number.

40881257513 is a deficient number, since it is larger than the sum of its proper divisors (1).

40881257513 is an equidigital number, since it uses as much as digits as its factorization.

40881257513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 40881257513 in words is "forty billion, eight hundred eighty-one million, two hundred fifty-seven thousand, five hundred thirteen".