26431631444 has 6 divisors (see below), whose sum is σ = 46255355034. Its totient is φ = 13215815720.

The previous prime is 26431631419. The next prime is 26431631477. The reversal of 26431631444 is 44413613462.

It can be written as a sum of positive squares in only one way, i.e., 26406250000 + 25381444 = 162500^2 + 5038^2 .

It is a super-2 number, since 2×26431631444² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26431631398 and 26431631407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3303953927 + ... + 3303953934.

It is an arithmetic number, because the mean of its divisors is an integer number (7709225839).

Almost surely, 2^26431631444 is an apocalyptic number.

It is an amenable number.

26431631444 is a deficient number, since it is larger than the sum of its proper divisors (19823723590).

26431631444 is a wasteful number, since it uses less digits than its factorization.

26431631444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6607907865 (or 6607907863 counting only the distinct ones).

The product of its digits is 165888, while the sum is 38.

The spelling of 26431631444 in words is "twenty-six billion, four hundred thirty-one million, six hundred thirty-one thousand, four hundred forty-four".