2539967540 has 24 divisors (see below), whose sum is σ = 5818835232. Its totient is φ = 923624480.

The previous prime is 2539967539. The next prime is 2539967543. The reversal of 2539967540 is 457699352.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2539967543) 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, 5772434 + ... + 5772873.

It is an arithmetic number, because the mean of its divisors is an integer number (242451468).

Almost surely, 2^2539967540 is an apocalyptic number.

2539967540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2539967540 is an abundant number, since it is smaller than the sum of its proper divisors (3278867692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2539967540 is a wasteful number, since it uses less digits than its factorization.

2539967540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11545327 (or 11545325 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 50.

The square root of 2539967540 is about 50398.0906384359. The cubic root of 2539967540 is about 1364.4031775704.

It can be divided in two parts, 2539 and 967540, that added together give a palindrome (970079).

The spelling of 2539967540 in words is "two billion, five hundred thirty-nine million, nine hundred sixty-seven thousand, five hundred forty".