2539451680 has 24 divisors (see below), whose sum is σ = 5999454972. Its totient is φ = 1015780608.

The previous prime is 2539451647. The next prime is 2539451683. The reversal of 2539451680 is 861549352.

2539451680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2362348816 + 177102864 = 48604^2 + 13308^2 .

It is a zygodrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (2539451683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7935627 + ... + 7935946.

Almost surely, 2^2539451680 is an apocalyptic number.

2539451680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2539451680 is an abundant number, since it is smaller than the sum of its proper divisors (3460003292).

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

2539451680 is a wasteful number, since it uses less digits than its factorization.

2539451680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15871588 (or 15871580 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 2539451680 is about 50392.9725259386. The cubic root of 2539451680 is about 1364.3108025476.

The spelling of 2539451680 in words is "two billion, five hundred thirty-nine million, four hundred fifty-one thousand, six hundred eighty".