26669204639728 has 40 divisors (see below), whose sum is σ = 59057884185440. Its totient is φ = 11428760033280.

The previous prime is 26669204639699. The next prime is 26669204639827. The reversal of 26669204639728 is 82793640296662.

It is a super-2 number, since 2×26669204639728² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

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, 7934493 + ... + 10783996.

It is an arithmetic number, because the mean of its divisors is an integer number (1476447104636).

Almost surely, 2^{26669204639728} is an apocalyptic number.

26669204639728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

26669204639728 is an abundant number, since it is smaller than the sum of its proper divisors (32388679545712).

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

26669204639728 is a wasteful number, since it uses less digits than its factorization.

26669204639728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18731225 (or 18731219 counting only the distinct ones).

The product of its (nonzero) digits is 564350976, while the sum is 70.

The spelling of 26669204639728 in words is "twenty-six trillion, six hundred sixty-nine billion, two hundred four million, six hundred thirty-nine thousand, seven hundred twenty-eight".