40186536865 has 16 divisors (see below), whose sum is σ = 48893782608. Its totient is φ = 31702772736.

The previous prime is 40186536847. The next prime is 40186536883. The reversal of 40186536865 is 56863568104.

It is an interprime number because it is at equal distance from previous prime (40186536847) and next prime (40186536883).

It can be written as a sum of positive squares in 8 ways, for example, as 1144333584 + 39042203281 = 33828^2 + 197591^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40186536865 is a prime.

It is a super-2 number, since 2×40186536865² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3583447 + ... + 3594643.

It is an arithmetic number, because the mean of its divisors is an integer number (3055861413).

Almost surely, 2^40186536865 is an apocalyptic number.

It is an amenable number.

40186536865 is a deficient number, since it is larger than the sum of its proper divisors (8707245743).

40186536865 is a wasteful number, since it uses less digits than its factorization.

40186536865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21108.

The product of its (nonzero) digits is 4147200, while the sum is 52.

The spelling of 40186536865 in words is "forty billion, one hundred eighty-six million, five hundred thirty-six thousand, eight hundred sixty-five".