9855895144 has 8 divisors (see below), whose sum is σ = 18479803410. Its totient is φ = 4927947568.

The previous prime is 9855895139. The next prime is 9855895157. The reversal of 9855895144 is 4415985589.

It can be written as a sum of positive squares in only one way, i.e., 9377598244 + 478296900 = 96838^2 + 21870^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615993439 + ... + 615993454.

Almost surely, 2^9855895144 is an apocalyptic number.

It is an amenable number.

9855895144 is a deficient number, since it is larger than the sum of its proper divisors (8623908266).

9855895144 is a wasteful number, since it uses less digits than its factorization.

9855895144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231986899 (or 1231986895 counting only the distinct ones).

The product of its digits is 10368000, while the sum is 58.

The square root of 9855895144 is about 99276.8610704428. The cubic root of 9855895144 is about 2144.0357610106.

The spelling of 9855895144 in words is "nine billion, eight hundred fifty-five million, eight hundred ninety-five thousand, one hundred forty-four".