10061855865 has 48 divisors (see below), whose sum is σ = 17547199488. Its totient is φ = 5333620608.

The previous prime is 10061855831. The next prime is 10061855891. The reversal of 10061855865 is 56855816001.

10061855865 is a `hidden beast` number, since 1 + 0 + 0 + 61 + 8 + 5 + 586 + 5 = 666.

It is not a de Polignac number, because 10061855865 - 2⁶ = 10061855801 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 10061855865.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6420312 + ... + 6421878.

It is an arithmetic number, because the mean of its divisors is an integer number (365566656).

Almost surely, 2^10061855865 is an apocalyptic number.

10061855865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10061855865 is a deficient number, since it is larger than the sum of its proper divisors (7485343623).

10061855865 is a wasteful number, since it uses less digits than its factorization.

10061855865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358 (or 2355 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 45.

The spelling of 10061855865 in words is "ten billion, sixty-one million, eight hundred fifty-five thousand, eight hundred sixty-five".