105661587715 has 16 divisors (see below), whose sum is σ = 127148334048. Its totient is φ = 84293104896.

The previous prime is 105661587709. The next prime is 105661587727. The reversal of 105661587715 is 517785166501.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105661587715 is a prime.

It is a super-2 number, since 2×105661587715² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13003644 + ... + 13011766.

It is an arithmetic number, because the mean of its divisors is an integer number (7946770878).

Almost surely, 2^105661587715 is an apocalyptic number.

105661587715 is a deficient number, since it is larger than the sum of its proper divisors (21486746333).

105661587715 is an equidigital number, since it uses as much as digits as its factorization.

105661587715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15078.

The product of its (nonzero) digits is 1764000, while the sum is 52.

The spelling of 105661587715 in words is "one hundred five billion, six hundred sixty-one million, five hundred eighty-seven thousand, seven hundred fifteen".