26644666431 has 16 divisors (see below), whose sum is σ = 35596368000. Its totient is φ = 17728070688.

The previous prime is 26644666427. The next prime is 26644666441. The reversal of 26644666431 is 13466644662.

It is not a de Polignac number, because 26644666431 - 2² = 26644666427 is a prime.

It is a super-2 number, since 2×26644666431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26644666441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5222920 + ... + 5228018.

It is an arithmetic number, because the mean of its divisors is an integer number (2224773000).

Almost surely, 2^26644666431 is an apocalyptic number.

26644666431 is a deficient number, since it is larger than the sum of its proper divisors (8951701569).

26644666431 is a wasteful number, since it uses less digits than its factorization.

26644666431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8198.

The product of its digits is 2985984, while the sum is 48.

The spelling of 26644666431 in words is "twenty-six billion, six hundred forty-four million, six hundred sixty-six thousand, four hundred thirty-one".