10506865187 has 16 divisors (see below), whose sum is σ = 12937317120. Its totient is φ = 8309401632.

The previous prime is 10506865169. The next prime is 10506865211. The reversal of 10506865187 is 78156860501.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-10506865187 is a prime.

It is a super-2 number, since 2×10506865187² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10506865687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188168 + ... + 237530.

It is an arithmetic number, because the mean of its divisors is an integer number (808582320).

Almost surely, 2^10506865187 is an apocalyptic number.

10506865187 is a deficient number, since it is larger than the sum of its proper divisors (2430451933).

10506865187 is a wasteful number, since it uses less digits than its factorization.

10506865187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51722.

The product of its (nonzero) digits is 403200, while the sum is 47.

The spelling of 10506865187 in words is "ten billion, five hundred six million, eight hundred sixty-five thousand, one hundred eighty-seven".