26440864626464 has 24 divisors (see below), whose sum is σ = 52435419046668. Its totient is φ = 13123932805120.

The previous prime is 26440864626461. The next prime is 26440864626499. The reversal of 26440864626464 is 46462646804462.

It can be written as a sum of positive squares in 2 ways, for example, as 25101502819600 + 1339361806864 = 5010140^2 + 1157308^2 .

It is a junction number, because it is equal to n+sod(n) for n = 26440864626397 and 26440864626406.

It is not an unprimeable number, because it can be changed into a prime (26440864626461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3015605177 + ... + 3015613944.

Almost surely, 2^{26440864626464} is an apocalyptic number.

It is an amenable number.

26440864626464 is a deficient number, since it is larger than the sum of its proper divisors (25994554420204).

26440864626464 is a wasteful number, since it uses less digits than its factorization.

26440864626464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6031219268 (or 6031219260 counting only the distinct ones).

The product of its (nonzero) digits is 254803968, while the sum is 62.

The spelling of 26440864626464 in words is "twenty-six trillion, four hundred forty billion, eight hundred sixty-four million, six hundred twenty-six thousand, four hundred sixty-four".