26400329440 has 24 divisors (see below), whose sum is σ = 62370778680. Its totient is φ = 10560131712.

The previous prime is 26400329411. The next prime is 26400329447. The reversal of 26400329440 is 4492300462.

It is a junction number, because it is equal to n+sod(n) for n = 26400329396 and 26400329405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26400329447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82500870 + ... + 82501189.

It is an arithmetic number, because the mean of its divisors is an integer number (2598782445).

Almost surely, 2^26400329440 is an apocalyptic number.

26400329440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26400329440 is an abundant number, since it is smaller than the sum of its proper divisors (35970449240).

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

26400329440 is a wasteful number, since it uses less digits than its factorization.

26400329440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165002074 (or 165002066 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The spelling of 26400329440 in words is "twenty-six billion, four hundred million, three hundred twenty-nine thousand, four hundred forty".