9810855381 has 8 divisors (see below), whose sum is σ = 13083010560. Its totient is φ = 6539635232.

The previous prime is 9810855349. The next prime is 9810855407. The reversal of 9810855381 is 1835580189.

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 9810855381 - 2⁵ = 9810855349 is a prime.

It is a super-2 number, since 2×9810855381² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9810855381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9810855581) 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, 208896 + ... + 251513.

It is an arithmetic number, because the mean of its divisors is an integer number (1635376320).

Almost surely, 2^9810855381 is an apocalyptic number.

It is an amenable number.

9810855381 is a deficient number, since it is larger than the sum of its proper divisors (3272155179).

9810855381 is a wasteful number, since it uses less digits than its factorization.

9810855381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467515.

The product of its (nonzero) digits is 345600, while the sum is 48.

The square root of 9810855381 is about 99049.7621450955. The cubic root of 9810855381 is about 2140.7648139019.

The spelling of 9810855381 in words is "nine billion, eight hundred ten million, eight hundred fifty-five thousand, three hundred eighty-one".