2261123660 has 24 divisors (see below), whose sum is σ = 4750655616. Its totient is φ = 904012160.

The previous prime is 2261123651. The next prime is 2261123693. The reversal of 2261123660 is 663211622.

It is a super-2 number, since 2×2261123660² = 10225360411623591200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16805 + ... + 69315.

It is an arithmetic number, because the mean of its divisors is an integer number (197943984).

Almost surely, 2^2261123660 is an apocalyptic number.

2261123660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2261123660 is an abundant number, since it is smaller than the sum of its proper divisors (2489531956).

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

2261123660 is a wasteful number, since it uses less digits than its factorization.

2261123660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54673 (or 54671 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 2261123660 is about 47551.2740102723. The cubic root of 2261123660 is about 1312.5265731279.

The spelling of 2261123660 in words is "two billion, two hundred sixty-one million, one hundred twenty-three thousand, six hundred sixty".