26641631 has 8 divisors (see below), whose sum is σ = 26915520. Its totient is φ = 26369568.

The previous prime is 26641607. The next prime is 26641649. The reversal of 26641631 is 13614662.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26641631 is a prime.

It is a super-2 number, since 2×26641631² = 1419553004680322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26641594 and 26641603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26641661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72410 + ... + 72776.

It is an arithmetic number, because the mean of its divisors is an integer number (3364440).

Almost surely, 2^26641631 is an apocalyptic number.

26641631 is a deficient number, since it is larger than the sum of its proper divisors (273889).

26641631 is a wasteful number, since it uses less digits than its factorization.

26641631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913.

The product of its digits is 5184, while the sum is 29.

The square root of 26641631 is about 5161.5531577230. The cubic root of 26641631 is about 298.6667913666. Note that the first 3 decimals are identical.

It can be divided in two parts, 26641 and 631, that added together give a palindrome (27272).

The spelling of 26641631 in words is "twenty-six million, six hundred forty-one thousand, six hundred thirty-one".