2181026650 has 48 divisors (see below), whose sum is σ = 4528469088. Its totient is φ = 774648000.

The previous prime is 2181026641. The next prime is 2181026657. The reversal of 2181026650 is 566201812.

It is not an unprimeable number, because it can be changed into a prime (2181026657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22461 + ... + 69760.

It is an arithmetic number, because the mean of its divisors is an integer number (94343106).

Almost surely, 2^2181026650 is an apocalyptic number.

2181026650 is an abundant number, since it is smaller than the sum of its proper divisors (2347442438).

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

2181026650 is a wasteful number, since it uses less digits than its factorization.

2181026650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92287 (or 92282 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 2181026650 is about 46701.4630391811. The cubic root of 2181026650 is about 1296.8417714620.

The spelling of 2181026650 in words is "two billion, one hundred eighty-one million, twenty-six thousand, six hundred fifty".