26257007240 has 32 divisors (see below), whose sum is σ = 59375160000. Its totient is φ = 10450021824.

The previous prime is 26257007233. The next prime is 26257007279. The reversal of 26257007240 is 4270075262.

It is a self number, because there is not a number n which added to its sum of digits gives 26257007240.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1641350 + ... + 1657269.

It is an arithmetic number, because the mean of its divisors is an integer number (1855473750).

Almost surely, 2^26257007240 is an apocalyptic number.

26257007240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26257007240 is an abundant number, since it is smaller than the sum of its proper divisors (33118152760).

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

26257007240 is a wasteful number, since it uses less digits than its factorization.

26257007240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3298829 (or 3298825 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 35.

The spelling of 26257007240 in words is "twenty-six billion, two hundred fifty-seven million, seven thousand, two hundred forty".