2181156532682 has 8 divisors (see below), whose sum is σ = 3272032181376. Its totient is φ = 1090479138892.

The previous prime is 2181156532601. The next prime is 2181156532729. The reversal of 2181156532682 is 2862356511812.

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

It is a super-2 number, since 2×2181156532682² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2181156532682.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49536218 + ... + 49580229.

It is an arithmetic number, because the mean of its divisors is an integer number (409004022672).

Almost surely, 2^{2181156532682} is an apocalyptic number.

2181156532682 is a deficient number, since it is larger than the sum of its proper divisors (1090875648694).

2181156532682 is a wasteful number, since it uses less digits than its factorization.

2181156532682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99127452.

The product of its digits is 1382400, while the sum is 50.

The spelling of 2181156532682 in words is "two trillion, one hundred eighty-one billion, one hundred fifty-six million, five hundred thirty-two thousand, six hundred eighty-two".