10165606016521 has 2 divisors, whose sum is σ = 10165606016522. Its totient is φ = 10165606016520.

The previous prime is 10165606016497. The next prime is 10165606016539. The reversal of 10165606016521 is 12561060656101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7889716970496 + 2275889046025 = 2808864^2 + 1508605^2 .

It is a cyclic number.

It is not a de Polignac number, because 10165606016521 - 2²⁷ = 10165471798793 is a prime.

It is not a weakly prime, because it can be changed into another prime (10165606016021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5082803008260 + 5082803008261.

It is an arithmetic number, because the mean of its divisors is an integer number (5082803008261).

Almost surely, 2^{10165606016521} is an apocalyptic number.

It is an amenable number.

10165606016521 is a deficient number, since it is larger than the sum of its proper divisors (1).

10165606016521 is an equidigital number, since it uses as much as digits as its factorization.

10165606016521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 10165606016521 in words is "ten trillion, one hundred sixty-five billion, six hundred six million, sixteen thousand, five hundred twenty-one".