10105187865 has 32 divisors (see below), whose sum is σ = 16399034496. Its totient is φ = 5312985600.

The previous prime is 10105187861. The next prime is 10105187879. The reversal of 10105187865 is 56878150101.

It is not a de Polignac number, because 10105187865 - 2² = 10105187861 is a prime.

It is a super-2 number, since 2×10105187865² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10105187861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 338682 + ... + 367308.

It is an arithmetic number, because the mean of its divisors is an integer number (512469828).

Almost surely, 2^10105187865 is an apocalyptic number.

10105187865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10105187865 is a deficient number, since it is larger than the sum of its proper divisors (6293846631).

10105187865 is a wasteful number, since it uses less digits than its factorization.

10105187865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28969.

The product of its (nonzero) digits is 67200, while the sum is 42.

The spelling of 10105187865 in words is "ten billion, one hundred five million, one hundred eighty-seven thousand, eight hundred sixty-five".