26244262640 has 40 divisors (see below), whose sum is σ = 61067787840. Its totient is φ = 10489124096.

The previous prime is 26244262613. The next prime is 26244262663. The reversal of 26244262640 is 4626244262.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×26244262640² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26244262594 and 26244262603.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35144 + ... + 231783.

It is an arithmetic number, because the mean of its divisors is an integer number (1526694696).

Almost surely, 2^26244262640 is an apocalyptic number.

26244262640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26244262640 is an abundant number, since it is smaller than the sum of its proper divisors (34823525200).

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

26244262640 is a wasteful number, since it uses less digits than its factorization.

26244262640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268169 (or 268163 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 38.

The spelling of 26244262640 in words is "twenty-six billion, two hundred forty-four million, two hundred sixty-two thousand, six hundred forty".