26440406406 has 24 divisors (see below), whose sum is σ = 57296776680. Its totient is φ = 8812048896.

The previous prime is 26440406381. The next prime is 26440406407. The reversal of 26440406406 is 60460404462.

It is a happy number.

26440406406 is a `hidden beast` number, since 2 + 6 + 4 + 4 + 0 + 4 + 0 + 640 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26440406407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 315 + ... + 229958.

It is an arithmetic number, because the mean of its divisors is an integer number (2387365695).

Almost surely, 2^26440406406 is an apocalyptic number.

26440406406 is an abundant number, since it is smaller than the sum of its proper divisors (30856370274).

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

26440406406 is a wasteful number, since it uses less digits than its factorization.

26440406406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236660 (or 236657 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The spelling of 26440406406 in words is "twenty-six billion, four hundred forty million, four hundred six thousand, four hundred six".