2539866811 has 16 divisors (see below), whose sum is σ = 2633637888. Its totient is φ = 2447752000.

The previous prime is 2539866809. The next prime is 2539866817. The reversal of 2539866811 is 1186689352.

It is a cyclic number.

It is not a de Polignac number, because 2539866811 - 2¹ = 2539866809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2539866817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2206086 + ... + 2207236.

It is an arithmetic number, because the mean of its divisors is an integer number (164602368).

Almost surely, 2^2539866811 is an apocalyptic number.

2539866811 is a deficient number, since it is larger than the sum of its proper divisors (93771077).

2539866811 is a wasteful number, since it uses less digits than its factorization.

2539866811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802.

The product of its digits is 622080, while the sum is 49.

The square root of 2539866811 is about 50397.0912950341. The cubic root of 2539866811 is about 1364.3851410165.

The spelling of 2539866811 in words is "two billion, five hundred thirty-nine million, eight hundred sixty-six thousand, eight hundred eleven".