2542581756 has 72 divisors (see below), whose sum is σ = 7550712624. Its totient is φ = 711210240.

The previous prime is 2542581731. The next prime is 2542581841. The reversal of 2542581756 is 6571852452.

2542581756 is a `hidden beast` number, since 2 + 542 + 58 + 1 + 7 + 56 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 241801 + ... + 252096.

Almost surely, 2^2542581756 is an apocalyptic number.

2542581756 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2542581756 is an abundant number, since it is smaller than the sum of its proper divisors (5008130868).

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

2542581756 is a wasteful number, since it uses less digits than its factorization.

2542581756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493931 (or 493926 counting only the distinct ones).

The product of its digits is 672000, while the sum is 45.

The square root of 2542581756 is about 50424.0196335040. The cubic root of 2542581756 is about 1364.8711128959.

The spelling of 2542581756 in words is "two billion, five hundred forty-two million, five hundred eighty-one thousand, seven hundred fifty-six".