9648857851 has 2 divisors, whose sum is σ = 9648857852. Its totient is φ = 9648857850.

The previous prime is 9648857843. The next prime is 9648857887. The reversal of 9648857851 is 1587588469.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9648857851 - 2³ = 9648857843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9648857851.

It is not a weakly prime, because it can be changed into another prime (9648837851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4824428925 + 4824428926.

It is an arithmetic number, because the mean of its divisors is an integer number (4824428926).

Almost surely, 2^9648857851 is an apocalyptic number.

9648857851 is a deficient number, since it is larger than the sum of its proper divisors (1).

9648857851 is an equidigital number, since it uses as much as digits as its factorization.

9648857851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19353600, while the sum is 61.

The square root of 9648857851 is about 98228.5999645724. The cubic root of 9648857851 is about 2128.9165400121.

The spelling of 9648857851 in words is "nine billion, six hundred forty-eight million, eight hundred fifty-seven thousand, eight hundred fifty-one".