26397930657280 has 480 divisors, whose sum is σ = 79926261624000. Its totient is φ = 8354462957568.

The previous prime is 26397930657271. The next prime is 26397930657281. The reversal of 26397930657280 is 8275603979362.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26397930657281) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 148306576 + ... + 148484464.

It is an arithmetic number, because the mean of its divisors is an integer number (166513045050).

Almost surely, 2^{26397930657280} is an apocalyptic number.

26397930657280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26397930657280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39963130812000).

26397930657280 is an abundant number, since it is smaller than the sum of its proper divisors (53528330966720).

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

26397930657280 is an equidigital number, since it uses as much as digits as its factorization.

26397930657280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177959 (or 177916 counting only the distinct ones).

The product of its (nonzero) digits is 205752960, while the sum is 67.

The spelling of 26397930657280 in words is "twenty-six trillion, three hundred ninety-seven billion, nine hundred thirty million, six hundred fifty-seven thousand, two hundred eighty".