21655044131662 has 8 divisors (see below), whose sum is σ = 32817438014256. Its totient is φ = 10715898126912.

The previous prime is 21655044131621. The next prime is 21655044131663. The reversal of 21655044131662 is 26613144055612.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21655044131663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55811969218 + ... + 55811969605.

It is an arithmetic number, because the mean of its divisors is an integer number (4102179751782).

Almost surely, 2^{21655044131662} is an apocalyptic number.

21655044131662 is a deficient number, since it is larger than the sum of its proper divisors (11162393882594).

21655044131662 is a wasteful number, since it uses less digits than its factorization.

21655044131662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111623938922.

The product of its (nonzero) digits is 1036800, while the sum is 46.

The spelling of 21655044131662 in words is "twenty-one trillion, six hundred fifty-five billion, forty-four million, one hundred thirty-one thousand, six hundred sixty-two".