26345640240 has 60 divisors (see below), whose sum is σ = 88477444224. Its totient is φ = 7025503872.

The previous prime is 26345640193. The next prime is 26345640257. The reversal of 26345640240 is 4204654362.

26345640240 is a `hidden beast` number, since 2 + 6 + 3 + 4 + 5 + 640 + 2 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 26345640195 and 26345640204.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18294864 + ... + 18296303.

Almost surely, 2^26345640240 is an apocalyptic number.

26345640240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26345640240 is an abundant number, since it is smaller than the sum of its proper divisors (62131803984).

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

26345640240 is a wasteful number, since it uses less digits than its factorization.

26345640240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36591186 (or 36591177 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

The spelling of 26345640240 in words is "twenty-six billion, three hundred forty-five million, six hundred forty thousand, two hundred forty".