26405204140 has 24 divisors (see below), whose sum is σ = 63372490272. Its totient is φ = 9053212800.

The previous prime is 26405204123. The next prime is 26405204141. The reversal of 26405204140 is 4140250462.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 26405204099 and 26405204108.

It is not an unprimeable number, because it can be changed into a prime (26405204141) 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, 94304161 + ... + 94304440.

It is an arithmetic number, because the mean of its divisors is an integer number (2640520428).

Almost surely, 2^26405204140 is an apocalyptic number.

26405204140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26405204140 is an abundant number, since it is smaller than the sum of its proper divisors (36967286132).

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

26405204140 is a wasteful number, since it uses less digits than its factorization.

26405204140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188608617 (or 188608615 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The spelling of 26405204140 in words is "twenty-six billion, four hundred five million, two hundred four thousand, one hundred forty".