858561101253 has 12 divisors (see below), whose sum is σ = 1240154100588. Its totient is φ = 572369319360.

The previous prime is 858561101249. The next prime is 858561101269. The reversal of 858561101253 is 352101165858.

858561101253 is a `hidden beast` number, since 8 + 5 + 8 + 5 + 611 + 0 + 1 + 25 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 316089079524 + 542472021729 = 562218^2 + 736527^2 .

It is not a de Polignac number, because 858561101253 - 2² = 858561101249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 858561101199 and 858561101208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858561101653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1013751 + ... + 1656747.

It is an arithmetic number, because the mean of its divisors is an integer number (103346175049).

Almost surely, 2^858561101253 is an apocalyptic number.

It is an amenable number.

858561101253 is a deficient number, since it is larger than the sum of its proper divisors (381592999335).

858561101253 is a wasteful number, since it uses less digits than its factorization.

858561101253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791364 (or 791361 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 45.

The spelling of 858561101253 in words is "eight hundred fifty-eight billion, five hundred sixty-one million, one hundred one thousand, two hundred fifty-three".