2539662861 has 16 divisors (see below), whose sum is σ = 3668791104. Its totient is φ = 1556454144.

The previous prime is 2539662859. The next prime is 2539662913. The reversal of 2539662861 is 1682669352.

It is not a de Polignac number, because 2539662861 - 2¹ = 2539662859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2539662861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2539662821) 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, 576846 + ... + 581231.

It is an arithmetic number, because the mean of its divisors is an integer number (229299444).

Almost surely, 2^2539662861 is an apocalyptic number.

It is an amenable number.

2539662861 is a deficient number, since it is larger than the sum of its proper divisors (1129128243).

2539662861 is a wasteful number, since it uses less digits than its factorization.

2539662861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158140.

The product of its digits is 933120, while the sum is 48.

The square root of 2539662861 is about 50395.0678241433. The cubic root of 2539662861 is about 1364.3486202303.

The spelling of 2539662861 in words is "two billion, five hundred thirty-nine million, six hundred sixty-two thousand, eight hundred sixty-one".