21800545117265 has 8 divisors (see below), whose sum is σ = 27537530674560. Its totient is φ = 16522518404592.

The previous prime is 21800545117243. The next prime is 21800545117313. The reversal of 21800545117265 is 56271154500812.

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

It is a cyclic number.

It is not a de Polignac number, because 21800545117265 - 2⁴⁰ = 20701033489489 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114739711049 + ... + 114739711238.

It is an arithmetic number, because the mean of its divisors is an integer number (3442191334320).

Almost surely, 2^{21800545117265} is an apocalyptic number.

It is an amenable number.

21800545117265 is a deficient number, since it is larger than the sum of its proper divisors (5736985557295).

21800545117265 is a wasteful number, since it uses less digits than its factorization.

21800545117265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229479422311.

The product of its (nonzero) digits is 672000, while the sum is 47.

The spelling of 21800545117265 in words is "twenty-one trillion, eight hundred billion, five hundred forty-five million, one hundred seventeen thousand, two hundred sixty-five".