2645104239839 has 2 divisors, whose sum is σ = 2645104239840. Its totient is φ = 2645104239838.

The previous prime is 2645104239781. The next prime is 2645104239857. The reversal of 2645104239839 is 9389324015462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2645104239839 - 2¹² = 2645104235743 is a prime.

It is a super-2 number, since 2×2645104239839² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2645104238839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322552119919 + 1322552119920.

It is an arithmetic number, because the mean of its divisors is an integer number (1322552119920).

Almost surely, 2^{2645104239839} is an apocalyptic number.

2645104239839 is a deficient number, since it is larger than the sum of its proper divisors (1).

2645104239839 is an equidigital number, since it uses as much as digits as its factorization.

2645104239839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11197440, while the sum is 56.

The spelling of 2645104239839 in words is "two trillion, six hundred forty-five billion, one hundred four million, two hundred thirty-nine thousand, eight hundred thirty-nine".