2502785668609 has 2 divisors, whose sum is σ = 2502785668610. Its totient is φ = 2502785668608.

The previous prime is 2502785668589. The next prime is 2502785668619. The reversal of 2502785668609 is 9068665872052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1352969101584 + 1149816567025 = 1163172^2 + 1072295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2502785668609 is a prime.

It is a super-2 number, since 2×2502785668609² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2502785668619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1251392834304 + 1251392834305.

It is an arithmetic number, because the mean of its divisors is an integer number (1251392834305).

Almost surely, 2^{2502785668609} is an apocalyptic number.

It is an amenable number.

2502785668609 is a deficient number, since it is larger than the sum of its proper divisors (1).

2502785668609 is an equidigital number, since it uses as much as digits as its factorization.

2502785668609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87091200, while the sum is 64.

The spelling of 2502785668609 in words is "two trillion, five hundred two billion, seven hundred eighty-five million, six hundred sixty-eight thousand, six hundred nine".