2125926661 has 2 divisors, whose sum is σ = 2125926662. Its totient is φ = 2125926660.

The previous prime is 2125926643. The next prime is 2125926667. The reversal of 2125926661 is 1666295212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2070796036 + 55130625 = 45506^2 + 7425^2 .

It is a cyclic number.

It is not a de Polignac number, because 2125926661 - 2¹⁵ = 2125893893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2125926667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062963330 + 1062963331.

It is an arithmetic number, because the mean of its divisors is an integer number (1062963331).

Almost surely, 2^2125926661 is an apocalyptic number.

It is an amenable number.

2125926661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125926661 is an equidigital number, since it uses as much as digits as its factorization.

2125926661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 40.

The square root of 2125926661 is about 46107.7722406971. The cubic root of 2125926661 is about 1285.8276471022.

The spelling of 2125926661 in words is "two billion, one hundred twenty-five million, nine hundred twenty-six thousand, six hundred sixty-one".