3215892610681 has 9 divisors (see below), whose sum is σ = 3232654922991. Its totient is φ = 3199216797672.

The previous prime is 3215892610643. The next prime is 3215892610691. The reversal of 3215892610681 is 1860162985123.

It is a happy number.

The square root of 3215892610681 is 1793291.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3150926757225 + 64965853456 = 1775085^2 + 254884^2 .

It is not a de Polignac number, because 3215892610681 - 2²³ = 3215884222073 is a prime.

It is a super-2 number, since 2×3215892610681² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3215892610691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 353273776 + ... + 353282878.

Almost surely, 2^{3215892610681} is an apocalyptic number.

3215892610681 is the 1793291-st square number.

3215892610681 is the 896646-th centered octagonal number.

It is an amenable number.

3215892610681 is a deficient number, since it is larger than the sum of its proper divisors (16762312310).

3215892610681 is an frugal number, since it uses more digits than its factorization.

3215892610681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18600 (or 9300 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 52.

The spelling of 3215892610681 in words is "three trillion, two hundred fifteen billion, eight hundred ninety-two million, six hundred ten thousand, six hundred eighty-one".