26359693440 has 64 divisors (see below), whose sum is σ = 84021528960. Its totient is φ = 7029251072.

The previous prime is 26359693433. The next prime is 26359693499. The reversal of 26359693440 is 4439695362.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6862584 + ... + 6866423.

It is an arithmetic number, because the mean of its divisors is an integer number (1312836390).

Almost surely, 2^26359693440 is an apocalyptic number.

26359693440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26359693440 is an abundant number, since it is smaller than the sum of its proper divisors (57661835520).

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

26359693440 is a wasteful number, since it uses less digits than its factorization.

26359693440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13729029 (or 13729017 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 51.

The spelling of 26359693440 in words is "twenty-six billion, three hundred fifty-nine million, six hundred ninety-three thousand, four hundred forty".