21857800275601 has 8 divisors (see below), whose sum is σ = 22564959238400. Its totient is φ = 21150770602320.

The previous prime is 21857800275593. The next prime is 21857800275611. The reversal of 21857800275601 is 10657200875812.

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 21857800275601 - 2³ = 21857800275593 is a prime.

It is a super-2 number, since 2×21857800275601² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21857800275611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31978731 + ... + 32655088.

It is an arithmetic number, because the mean of its divisors is an integer number (2820619904800).

Almost surely, 2^{21857800275601} is an apocalyptic number.

It is an amenable number.

21857800275601 is a deficient number, since it is larger than the sum of its proper divisors (707158962799).

21857800275601 is a wasteful number, since it uses less digits than its factorization.

21857800275601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64644759.

The product of its (nonzero) digits is 1881600, while the sum is 52.

The spelling of 21857800275601 in words is "twenty-one trillion, eight hundred fifty-seven billion, eight hundred million, two hundred seventy-five thousand, six hundred one".