15640516757009 has 2 divisors, whose sum is σ = 15640516757010. Its totient is φ = 15640516757008.

The previous prime is 15640516756981. The next prime is 15640516757011. The reversal of 15640516757009 is 90075761504651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13872108822784 + 1768407934225 = 3724528^2 + 1329815^2 .

It is a cyclic number.

It is not a de Polignac number, because 15640516757009 - 2²⁸ = 15640248321553 is a prime.

Together with 15640516757011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15640516757069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7820258378504 + 7820258378505.

It is an arithmetic number, because the mean of its divisors is an integer number (7820258378505).

Almost surely, 2^{15640516757009} is an apocalyptic number.

It is an amenable number.

15640516757009 is a deficient number, since it is larger than the sum of its proper divisors (1).

15640516757009 is an equidigital number, since it uses as much as digits as its factorization.

15640516757009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7938000, while the sum is 56.

The spelling of 15640516757009 in words is "fifteen trillion, six hundred forty billion, five hundred sixteen million, seven hundred fifty-seven thousand, nine".