26347809640 has 64 divisors (see below), whose sum is σ = 61352802000. Its totient is φ = 10171392000.

The previous prime is 26347809581. The next prime is 26347809667. The reversal of 26347809640 is 4690874362.

It can be written as a sum of positive squares in 8 ways, for example, as 20462158116 + 5885651524 = 143046^2 + 76718^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4786890 + ... + 4792390.

Almost surely, 2^26347809640 is an apocalyptic number.

26347809640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26347809640 is an abundant number, since it is smaller than the sum of its proper divisors (35004992360).

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

26347809640 is a wasteful number, since it uses less digits than its factorization.

26347809640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9670 (or 9666 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 49.

The spelling of 26347809640 in words is "twenty-six billion, three hundred forty-seven million, eight hundred nine thousand, six hundred forty".