26257644064 has 12 divisors (see below), whose sum is σ = 51694736814. Its totient is φ = 13128822016.

The previous prime is 26257644037. The next prime is 26257644067. The reversal of 26257644064 is 46044675262.

It can be written as a sum of positive squares in only one way, i.e., 13957059600 + 12300584464 = 118140^2 + 110908^2 .

It is not an unprimeable number, because it can be changed into a prime (26257644067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410275657 + ... + 410275720.

Almost surely, 2^26257644064 is an apocalyptic number.

It is an amenable number.

26257644064 is a deficient number, since it is larger than the sum of its proper divisors (25437092750).

26257644064 is an equidigital number, since it uses as much as digits as its factorization.

26257644064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820551387 (or 820551379 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 46.

The spelling of 26257644064 in words is "twenty-six billion, two hundred fifty-seven million, six hundred forty-four thousand, sixty-four".