21785560952401 has 8 divisors (see below), whose sum is σ = 22933092855680. Its totient is φ = 20638121392368.

The previous prime is 21785560952347. The next prime is 21785560952411. The reversal of 21785560952401 is 10425906558712.

It is a happy number.

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 21785560952401 - 2³¹ = 21783413468753 is a prime.

It is a super-2 number, since 2×21785560952401² (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 (21785560952411) 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, 22601286 + ... + 23545471.

It is an arithmetic number, because the mean of its divisors is an integer number (2866636606960).

Almost surely, 2^{21785560952401} is an apocalyptic number.

It is an amenable number.

21785560952401 is a deficient number, since it is larger than the sum of its proper divisors (1147531903279).

21785560952401 is a wasteful number, since it uses less digits than its factorization.

21785560952401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46171623.

The product of its (nonzero) digits is 6048000, while the sum is 55.

The spelling of 21785560952401 in words is "twenty-one trillion, seven hundred eighty-five billion, five hundred sixty million, nine hundred fifty-two thousand, four hundred one".