6397752413581 has 2 divisors, whose sum is σ = 6397752413582. Its totient is φ = 6397752413580.

The previous prime is 6397752413543. The next prime is 6397752413629. The reversal of 6397752413581 is 1853142577936.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4031280918025 + 2366471495556 = 2007805^2 + 1538334^2 .

It is a cyclic number.

It is not a de Polignac number, because 6397752413581 - 2¹³ = 6397752405389 is a prime.

It is a super-2 number, since 2×6397752413581² (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 (6397752483581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3198876206790 + 3198876206791.

It is an arithmetic number, because the mean of its divisors is an integer number (3198876206791).

Almost surely, 2^{6397752413581} is an apocalyptic number.

It is an amenable number.

6397752413581 is a deficient number, since it is larger than the sum of its proper divisors (1).

6397752413581 is an equidigital number, since it uses as much as digits as its factorization.

6397752413581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38102400, while the sum is 61.

The spelling of 6397752413581 in words is "six trillion, three hundred ninety-seven billion, seven hundred fifty-two million, four hundred thirteen thousand, five hundred eighty-one".