26440442064465 has 64 divisors (see below), whose sum is σ = 49718858192640. Its totient is φ = 11829145743360.

The previous prime is 26440442064403. The next prime is 26440442064469. The reversal of 26440442064465 is 56446024404462.

It is not a de Polignac number, because 26440442064465 - 2¹² = 26440442060369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26440442064469) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3595269 + ... + 8112141.

It is an arithmetic number, because the mean of its divisors is an integer number (776857159260).

Almost surely, 2^{26440442064465} is an apocalyptic number.

It is an amenable number.

26440442064465 is a deficient number, since it is larger than the sum of its proper divisors (23278416128175).

26440442064465 is a wasteful number, since it uses less digits than its factorization.

26440442064465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4519634.

The product of its (nonzero) digits is 17694720, while the sum is 51.

The spelling of 26440442064465 in words is "twenty-six trillion, four hundred forty billion, four hundred forty-two million, sixty-four thousand, four hundred sixty-five".