8413625390581 has 2 divisors, whose sum is σ = 8413625390582. Its totient is φ = 8413625390580.

The previous prime is 8413625390537. The next prime is 8413625390629. The reversal of 8413625390581 is 1850935263148.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5127258279025 + 3286367111556 = 2264345^2 + 1812834^2 .

It is a cyclic number.

It is not a de Polignac number, because 8413625390581 - 2⁷ = 8413625390453 is a prime.

It is a super-2 number, since 2×8413625390581² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8413625390281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4206812695290 + 4206812695291.

It is an arithmetic number, because the mean of its divisors is an integer number (4206812695291).

Almost surely, 2^{8413625390581} is an apocalyptic number.

It is an amenable number.

8413625390581 is a deficient number, since it is larger than the sum of its proper divisors (1).

8413625390581 is an equidigital number, since it uses as much as digits as its factorization.

8413625390581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6220800, while the sum is 55.

The spelling of 8413625390581 in words is "eight trillion, four hundred thirteen billion, six hundred twenty-five million, three hundred ninety thousand, five hundred eighty-one".