9878851761 has 8 divisors (see below), whose sum is σ = 13172578080. Its totient is φ = 6585513312.

The previous prime is 9878851757. The next prime is 9878851781. The reversal of 9878851761 is 1671588789.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9878851761 - 2² = 9878851757 is a prime.

It is a super-2 number, since 2×9878851761² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9878851695 and 9878851704.

It is not an unprimeable number, because it can be changed into a prime (9878851721) 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, 31156 + ... + 143973.

It is an arithmetic number, because the mean of its divisors is an integer number (1646572260).

Almost surely, 2^9878851761 is an apocalyptic number.

It is an amenable number.

9878851761 is a deficient number, since it is larger than the sum of its proper divisors (3293726319).

9878851761 is a wasteful number, since it uses less digits than its factorization.

9878851761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193935.

The product of its digits is 6773760, while the sum is 60.

The square root of 9878851761 is about 99392.4129951577. The cubic root of 9878851761 is about 2145.6991188877.

The spelling of 9878851761 in words is "nine billion, eight hundred seventy-eight million, eight hundred fifty-one thousand, seven hundred sixty-one".