9815796857 has 8 divisors (see below), whose sum is σ = 9893463360. Its totient is φ = 9738172080.

The previous prime is 9815796841. The next prime is 9815796899. The reversal of 9815796857 is 7586975189.

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 9815796857 - 2⁴ = 9815796841 is a prime.

It is a super-6 number, since 6×9815796857⁶ (a number of 61 digits) contains 666666 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9815796793 and 9815796802.

It is not an unprimeable number, because it can be changed into a prime (9815793857) 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, 602819 + ... + 618887.

It is an arithmetic number, because the mean of its divisors is an integer number (1236682920).

Almost surely, 2^9815796857 is an apocalyptic number.

It is an amenable number.

9815796857 is a deficient number, since it is larger than the sum of its proper divisors (77666503).

9815796857 is a wasteful number, since it uses less digits than its factorization.

9815796857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20863.

The product of its digits is 38102400, while the sum is 65.

The square root of 9815796857 is about 99074.7034161597. The cubic root of 9815796857 is about 2141.1241696696.

The spelling of 9815796857 in words is "nine billion, eight hundred fifteen million, seven hundred ninety-six thousand, eight hundred fifty-seven".