2402381247557 has 2 divisors, whose sum is σ = 2402381247558. Its totient is φ = 2402381247556.

The previous prime is 2402381247451. The next prime is 2402381247571. The reversal of 2402381247557 is 7557421832042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2230748357761 + 171632889796 = 1493569^2 + 414286^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2402381247557 is a prime.

It is a super-2 number, since 2×2402381247557² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2402381247857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1201190623778 + 1201190623779.

It is an arithmetic number, because the mean of its divisors is an integer number (1201190623779).

Almost surely, 2^{2402381247557} is an apocalyptic number.

It is an amenable number.

2402381247557 is a deficient number, since it is larger than the sum of its proper divisors (1).

2402381247557 is an equidigital number, since it uses as much as digits as its factorization.

2402381247557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3763200, while the sum is 50.

The spelling of 2402381247557 in words is "two trillion, four hundred two billion, three hundred eighty-one million, two hundred forty-seven thousand, five hundred fifty-seven".