2116861582 has 16 divisors (see below), whose sum is σ = 3468385152. Its totient is φ = 960979320.

The previous prime is 2116861561. The next prime is 2116861609. The reversal of 2116861582 is 2851686112.

It is a happy number.

It is a super-2 number, since 2×2116861582² = 8962205914695085448, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 43818 + ... + 78445.

It is an arithmetic number, because the mean of its divisors is an integer number (216774072).

Almost surely, 2^2116861582 is an apocalyptic number.

2116861582 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2116861582 is a deficient number, since it is larger than the sum of its proper divisors (1351523570).

2116861582 is a wasteful number, since it uses less digits than its factorization.

2116861582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123063.

The product of its digits is 46080, while the sum is 40.

The square root of 2116861582 is about 46009.3640686328. The cubic root of 2116861582 is about 1283.9974277987.

The spelling of 2116861582 in words is "two billion, one hundred sixteen million, eight hundred sixty-one thousand, five hundred eighty-two".