866788526243431 has 16 divisors (see below), whose sum is σ = 976102376288256. Its totient is φ = 762561120420000.

The previous prime is 866788526243429. The next prime is 866788526243443. The reversal of 866788526243431 is 134342625887668.

It is not a de Polignac number, because 866788526243431 - 2¹ = 866788526243429 is a prime.

It is a super-2 number, since 2×866788526243431² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866788526213431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11968201 + ... + 43322221.

It is an arithmetic number, because the mean of its divisors is an integer number (61006398518016).

Almost surely, 2^{866788526243431} is an apocalyptic number.

866788526243431 is a deficient number, since it is larger than the sum of its proper divisors (109313850044825).

866788526243431 is a wasteful number, since it uses less digits than its factorization.

866788526243431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31435134.

The product of its digits is 2229534720, while the sum is 73.

The spelling of 866788526243431 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, five hundred twenty-six million, two hundred forty-three thousand, four hundred thirty-one".