40686466861 has 4 divisors (see below), whose sum is σ = 40687808224. Its totient is φ = 40685125500.

The previous prime is 40686466831. The next prime is 40686466879. The reversal of 40686466861 is 16866468604.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40686466861 - 2¹⁵ = 40686434093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40686466831) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 624105 + ... + 686206.

It is an arithmetic number, because the mean of its divisors is an integer number (10171952056).

Almost surely, 2^40686466861 is an apocalyptic number.

It is an amenable number.

40686466861 is a deficient number, since it is larger than the sum of its proper divisors (1341363).

40686466861 is a wasteful number, since it uses less digits than its factorization.

40686466861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341362.

The product of its (nonzero) digits is 7962624, while the sum is 55.

The spelling of 40686466861 in words is "forty billion, six hundred eighty-six million, four hundred sixty-six thousand, eight hundred sixty-one".