21655545650343 has 32 divisors (see below), whose sum is σ = 35441885260800. Its totient is φ = 12958439270400.

The previous prime is 21655545650327. The next prime is 21655545650441. The reversal of 21655545650343 is 34305654555612.

21655545650343 is a `hidden beast` number, since 2 + 1 + 6 + 5 + 5 + 545 + 6 + 50 + 3 + 43 = 666.

It is not a de Polignac number, because 21655545650343 - 2⁴ = 21655545650327 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21655545650343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21655545650243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 461459418 + ... + 461506343.

It is an arithmetic number, because the mean of its divisors is an integer number (1107558914400).

Almost surely, 2^{21655545650343} is an apocalyptic number.

21655545650343 is a deficient number, since it is larger than the sum of its proper divisors (13786339610457).

21655545650343 is a wasteful number, since it uses less digits than its factorization.

21655545650343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922965860 (or 922965854 counting only the distinct ones).

The product of its (nonzero) digits is 32400000, while the sum is 54.

The spelling of 21655545650343 in words is "twenty-one trillion, six hundred fifty-five billion, five hundred forty-five million, six hundred fifty thousand, three hundred forty-three".