26253901640 has 32 divisors (see below), whose sum is σ = 59260033080. Its totient is φ = 10468004352.

The previous prime is 26253901577. The next prime is 26253901657. The reversal of 26253901640 is 4610935262.

It can be written as a sum of positive squares in 4 ways, for example, as 7568652004 + 18685249636 = 86998^2 + 136694^2 .

It is a junction number, because it is equal to n+sod(n) for n = 26253901594 and 26253901603.

It is an unprimeable number.

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, 1035959 + ... + 1060998.

Almost surely, 2^26253901640 is an apocalyptic number.

26253901640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26253901640 is an abundant number, since it is smaller than the sum of its proper divisors (33006131440).

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

26253901640 is a wasteful number, since it uses less digits than its factorization.

26253901640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2097281 (or 2097277 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 26253901640 in words is "twenty-six billion, two hundred fifty-three million, nine hundred one thousand, six hundred forty".