15522765961 has 2 divisors, whose sum is σ = 15522765962. Its totient is φ = 15522765960.

The previous prime is 15522765949. The next prime is 15522765967. The reversal of 15522765961 is 16956722551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8550515961 + 6972250000 = 92469^2 + 83500^2 .

It is a cyclic number.

It is not a de Polignac number, because 15522765961 - 2¹¹ = 15522763913 is a prime.

It is not a weakly prime, because it can be changed into another prime (15522765967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7761382980 + 7761382981.

It is an arithmetic number, because the mean of its divisors is an integer number (7761382981).

Almost surely, 2^15522765961 is an apocalyptic number.

It is an amenable number.

15522765961 is a deficient number, since it is larger than the sum of its proper divisors (1).

15522765961 is an equidigital number, since it uses as much as digits as its factorization.

15522765961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1134000, while the sum is 49.

The spelling of 15522765961 in words is "fifteen billion, five hundred twenty-two million, seven hundred sixty-five thousand, nine hundred sixty-one".