65221425461 has 2 divisors, whose sum is σ = 65221425462. Its totient is φ = 65221425460.

The previous prime is 65221425431. The next prime is 65221425527. The reversal of 65221425461 is 16452412256.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34873695025 + 30347730436 = 186745^2 + 174206^2 .

It is a cyclic number.

It is not a de Polignac number, because 65221425461 - 2³⁰ = 64147683637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65221425421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32610712730 + 32610712731.

It is an arithmetic number, because the mean of its divisors is an integer number (32610712731).

Almost surely, 2^65221425461 is an apocalyptic number.

It is an amenable number.

65221425461 is a deficient number, since it is larger than the sum of its proper divisors (1).

65221425461 is an equidigital number, since it uses as much as digits as its factorization.

65221425461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115200, while the sum is 38.

The spelling of 65221425461 in words is "sixty-five billion, two hundred twenty-one million, four hundred twenty-five thousand, four hundred sixty-one".