2618061281 has 32 divisors (see below), whose sum is σ = 3125606400. Its totient is φ = 2166886080.

The previous prime is 2618061253. The next prime is 2618061301. The reversal of 2618061281 is 1821608162.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2618061281 is a prime.

It is a super-2 number, since 2×2618061281² = 13708489742142721922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2618061211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 639800 + ... + 643878.

It is an arithmetic number, because the mean of its divisors is an integer number (97675200).

Almost surely, 2^2618061281 is an apocalyptic number.

It is an amenable number.

2618061281 is a deficient number, since it is larger than the sum of its proper divisors (507545119).

2618061281 is a wasteful number, since it uses less digits than its factorization.

2618061281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4229.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 2618061281 is about 51166.9940586703. The cubic root of 2618061281 is about 1378.2455617269.

The spelling of 2618061281 in words is "two billion, six hundred eighteen million, sixty-one thousand, two hundred eighty-one".