26440226646 has 32 divisors (see below), whose sum is σ = 53216206848. Its totient is φ = 8757552960.

The previous prime is 26440226609. The next prime is 26440226651. The reversal of 26440226646 is 64662204462.

It is a junction number, because it is equal to n+sod(n) for n = 26440226598 and 26440226607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1061491 + ... + 1086113.

It is an arithmetic number, because the mean of its divisors is an integer number (1663006464).

Almost surely, 2^26440226646 is an apocalyptic number.

26440226646 is an abundant number, since it is smaller than the sum of its proper divisors (26775980202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26440226646 is a wasteful number, since it uses less digits than its factorization.

26440226646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25756.

The product of its (nonzero) digits is 663552, while the sum is 42.

The spelling of 26440226646 in words is "twenty-six billion, four hundred forty million, two hundred twenty-six thousand, six hundred forty-six".