2645419939 has 2 divisors, whose sum is σ = 2645419940. Its totient is φ = 2645419938.

The previous prime is 2645419901. The next prime is 2645419981. The reversal of 2645419939 is 9399145462.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2645419939 is a prime.

It is not a weakly prime, because it can be changed into another prime (2645419339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322709969 + 1322709970.

It is an arithmetic number, because the mean of its divisors is an integer number (1322709970).

Almost surely, 2^2645419939 is an apocalyptic number.

2645419939 is a deficient number, since it is larger than the sum of its proper divisors (1).

2645419939 is an equidigital number, since it uses as much as digits as its factorization.

2645419939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2099520, while the sum is 52.

The square root of 2645419939 is about 51433.6459819834. The cubic root of 2645419939 is about 1383.0298093963.

The spelling of 2645419939 in words is "two billion, six hundred forty-five million, four hundred nineteen thousand, nine hundred thirty-nine".