26405026664 has 32 divisors (see below), whose sum is σ = 50284333440. Its totient is φ = 12996446400.

The previous prime is 26405026657. The next prime is 26405026667. The reversal of 26405026664 is 46662050462.

It is not an unprimeable number, because it can be changed into a prime (26405026667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335309 + ... + 406499.

It is an arithmetic number, because the mean of its divisors is an integer number (1571385420).

Almost surely, 2^26405026664 is an apocalyptic number.

It is an amenable number.

26405026664 is a deficient number, since it is larger than the sum of its proper divisors (23879306776).

26405026664 is a wasteful number, since it uses less digits than its factorization.

26405026664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71921 (or 71917 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 26405026664 in words is "twenty-six billion, four hundred five million, twenty-six thousand, six hundred sixty-four".