26391666052080 has 1600 divisors, whose sum is σ = 112279059180288. Its totient is φ = 5608394588160.

The previous prime is 26391666052051. The next prime is 26391666052099. The reversal of 26391666052080 is 8025066619362.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 24146080014 + ... + 24146081106.

Almost surely, 2^{26391666052080} is an apocalyptic number.

26391666052080 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 26391666052080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56139529590144).

26391666052080 is an abundant number, since it is smaller than the sum of its proper divisors (85887393128208).

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

26391666052080 is a wasteful number, since it uses less digits than its factorization.

26391666052080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1496 (or 1481 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 26391666052080 in words is "twenty-six trillion, three hundred ninety-one billion, six hundred sixty-six million, fifty-two thousand, eighty".