2542655681 has 16 divisors (see below), whose sum is σ = 2785259520. Its totient is φ = 2313719760.

The previous prime is 2542655669. The next prime is 2542655701. The reversal of 2542655681 is 1865562452.

It is a happy number.

2542655681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2542655681 - 2³⁰ = 1468913857 is a prime.

It is a super-2 number, since 2×2542655681² = 12930195824243147522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2542655641) 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, 11846 + ... + 72288.

It is an arithmetic number, because the mean of its divisors is an integer number (174078720).

Almost surely, 2^2542655681 is an apocalyptic number.

It is an amenable number.

2542655681 is a deficient number, since it is larger than the sum of its proper divisors (242603839).

2542655681 is a wasteful number, since it uses less digits than its factorization.

2542655681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60556.

The product of its digits is 576000, while the sum is 44.

The square root of 2542655681 is about 50424.7526617633. The cubic root of 2542655681 is about 1364.8843405426.

The spelling of 2542655681 in words is "two billion, five hundred forty-two million, six hundred fifty-five thousand, six hundred eighty-one".