9864725859 has 20 divisors (see below), whose sum is σ = 15014243376. Its totient is φ = 6452396496.

The previous prime is 9864725851. The next prime is 9864725873. The reversal of 9864725859 is 9585274689.

9864725859 is a `hidden beast` number, since 9 + 8 + 6 + 47 + 2 + 585 + 9 = 666.

It is not a de Polignac number, because 9864725859 - 2³ = 9864725851 is a prime.

It is a super-4 number, since 4×9864725859⁴ (a number of 41 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9864725796 and 9864725805.

It is not an unprimeable number, because it can be changed into a prime (9864725851) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1144639 + ... + 1153224.

Almost surely, 2^9864725859 is an apocalyptic number.

9864725859 is a deficient number, since it is larger than the sum of its proper divisors (5149517517).

9864725859 is a wasteful number, since it uses less digits than its factorization.

9864725859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297928 (or 2297919 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 63.

The square root of 9864725859 is about 99321.3263050791. The cubic root of 9864725859 is about 2144.6759097619.

The spelling of 9864725859 in words is "nine billion, eight hundred sixty-four million, seven hundred twenty-five thousand, eight hundred fifty-nine".