1922961850681 has 9 divisors (see below), whose sum is σ = 1944935758573. Its totient is φ = 1901233507360.

The previous prime is 1922961850679. The next prime is 1922961850709. The reversal of 1922961850681 is 1860581692291.

The square root of 1922961850681 is 1386709.

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

It can be written as a sum of positive squares in 4 ways, for example, as 493167703081 + 1429794147600 = 702259^2 + 1195740^2 .

It is not a de Polignac number, because 1922961850681 - 2¹ = 1922961850679 is a prime.

It is a super-2 number, since 2×1922961850681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1922961850651) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 123409311 + ... + 123424891.

Almost surely, 2^{1922961850681} is an apocalyptic number.

1922961850681 is the 1386709-th square number.

1922961850681 is the 693355-th centered octagonal number.

It is an amenable number.

1922961850681 is a deficient number, since it is larger than the sum of its proper divisors (21973907892).

1922961850681 is an frugal number, since it uses more digits than its factorization.

1922961850681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31340 (or 15670 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 58.

The spelling of 1922961850681 in words is "one trillion, nine hundred twenty-two billion, nine hundred sixty-one million, eight hundred fifty thousand, six hundred eighty-one".