2615235312509 has 2 divisors, whose sum is σ = 2615235312510. Its totient is φ = 2615235312508.

The previous prime is 2615235312499. The next prime is 2615235312511. The reversal of 2615235312509 is 9052135325162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1543254629284 + 1071980683225 = 1242278^2 + 1035365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2615235312509 is a prime.

Together with 2615235312511, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2615235312509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2615235312589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1307617656254 + 1307617656255.

It is an arithmetic number, because the mean of its divisors is an integer number (1307617656255).

Almost surely, 2^{2615235312509} is an apocalyptic number.

It is an amenable number.

2615235312509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2615235312509 is an equidigital number, since it uses as much as digits as its factorization.

2615235312509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486000, while the sum is 44.

The spelling of 2615235312509 in words is "two trillion, six hundred fifteen billion, two hundred thirty-five million, three hundred twelve thousand, five hundred nine".