2539591871 has 2 divisors, whose sum is σ = 2539591872. Its totient is φ = 2539591870.

The previous prime is 2539591861. The next prime is 2539591877. The reversal of 2539591871 is 1781959352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2539591871 - 2²⁶ = 2472483007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2539591877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1269795935 + 1269795936.

It is an arithmetic number, because the mean of its divisors is an integer number (1269795936).

Almost surely, 2^2539591871 is an apocalyptic number.

2539591871 is a deficient number, since it is larger than the sum of its proper divisors (1).

2539591871 is an equidigital number, since it uses as much as digits as its factorization.

2539591871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 50.

The square root of 2539591871 is about 50394.3634844215. The cubic root of 2539591871 is about 1364.3359077804.

The spelling of 2539591871 in words is "two billion, five hundred thirty-nine million, five hundred ninety-one thousand, eight hundred seventy-one".