2581113667 has 8 divisors (see below), whose sum is σ = 2824119792. Its totient is φ = 2339500800.

The previous prime is 2581113649. The next prime is 2581113671. The reversal of 2581113667 is 7663111852.

It is a happy number.

2581113667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2581113667 - 2²³ = 2572725059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2581113677) 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, 344434 + ... + 351847.

It is an arithmetic number, because the mean of its divisors is an integer number (353014974).

Almost surely, 2^2581113667 is an apocalyptic number.

2581113667 is a deficient number, since it is larger than the sum of its proper divisors (243006125).

2581113667 is a wasteful number, since it uses less digits than its factorization.

2581113667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696629.

The product of its digits is 60480, while the sum is 40.

The square root of 2581113667 is about 50804.6618628645. The cubic root of 2581113667 is about 1371.7312843378.

The spelling of 2581113667 in words is "two billion, five hundred eighty-one million, one hundred thirteen thousand, six hundred sixty-seven".