26643506532720 has 480 divisors, whose sum is σ = 110979823908096. Its totient is φ = 5210647142400.

The previous prime is 26643506532701. The next prime is 26643506532829. The reversal of 26643506532720 is 2723560534662.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3858646 + ... + 8256885.

Almost surely, 2^{26643506532720} is an apocalyptic number.

26643506532720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26643506532720 is an abundant number, since it is smaller than the sum of its proper divisors (84336317375376).

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

26643506532720 is a wasteful number, since it uses less digits than its factorization.

26643506532720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12115589 (or 12115576 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 51.

The spelling of 26643506532720 in words is "twenty-six trillion, six hundred forty-three billion, five hundred six million, five hundred thirty-two thousand, seven hundred twenty".