2539695646 has 16 divisors (see below), whose sum is σ = 3949626240. Its totient is φ = 1223511840.

The previous prime is 2539695643. The next prime is 2539695647. The reversal of 2539695646 is 6465969352.

2539695646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2539695646² = 12900107948622714632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2539695643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75241 + ... + 103636.

It is an arithmetic number, because the mean of its divisors is an integer number (246851640).

Almost surely, 2^2539695646 is an apocalyptic number.

2539695646 is a deficient number, since it is larger than the sum of its proper divisors (1409930594).

2539695646 is a wasteful number, since it uses less digits than its factorization.

2539695646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179139.

The product of its digits is 10497600, while the sum is 55.

The square root of 2539695646 is about 50395.3931029415. The cubic root of 2539695646 is about 1364.3544910853.

The spelling of 2539695646 in words is "two billion, five hundred thirty-nine million, six hundred ninety-five thousand, six hundred forty-six".