10215604681 has 2 divisors, whose sum is σ = 10215604682. Its totient is φ = 10215604680.

The previous prime is 10215604673. The next prime is 10215604709. The reversal of 10215604681 is 18640651201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7653625225 + 2561979456 = 87485^2 + 50616^2 .

It is a cyclic number.

It is not a de Polignac number, because 10215604681 - 2³ = 10215604673 is a prime.

It is a super-2 number, since 2×10215604681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10215604381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5107802340 + 5107802341.

It is an arithmetic number, because the mean of its divisors is an integer number (5107802341).

Almost surely, 2^10215604681 is an apocalyptic number.

It is an amenable number.

10215604681 is a deficient number, since it is larger than the sum of its proper divisors (1).

10215604681 is an equidigital number, since it uses as much as digits as its factorization.

10215604681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 34.

The spelling of 10215604681 in words is "ten billion, two hundred fifteen million, six hundred four thousand, six hundred eighty-one".