2181929291822 has 8 divisors (see below), whose sum is σ = 3740450214576. Its totient is φ = 935112553632.

The previous prime is 2181929291809. The next prime is 2181929291837. The reversal of 2181929291822 is 2281929291812.

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

It is a congruent number.

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, 77926046123 + ... + 77926046150.

It is an arithmetic number, because the mean of its divisors is an integer number (467556276822).

Almost surely, 2^{2181929291822} is an apocalyptic number.

2181929291822 is a deficient number, since it is larger than the sum of its proper divisors (1558520922754).

2181929291822 is a wasteful number, since it uses less digits than its factorization.

2181929291822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155852092282.

The product of its digits is 1492992, while the sum is 56.

The spelling of 2181929291822 in words is "two trillion, one hundred eighty-one billion, nine hundred twenty-nine million, two hundred ninety-one thousand, eight hundred twenty-two".