26621103363840 has 432 divisors, whose sum is σ = 98597276668800. Its totient is φ = 6611339501568.

The previous prime is 26621103363697. The next prime is 26621103363853. The reversal of 26621103363840 is 4836330112662.

26621103363840 is a `hidden beast` number, since 2 + 6 + 6 + 2 + 1 + 1 + 0 + 3 + 3 + 638 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 47 ways as a sum of consecutive naturals, for example, 11883207 + ... + 13944633.

Almost surely, 2^{26621103363840} is an apocalyptic number.

26621103363840 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 26621103363840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49298638334400).

26621103363840 is an abundant number, since it is smaller than the sum of its proper divisors (71976173304960).

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

26621103363840 is a wasteful number, since it uses less digits than its factorization.

26621103363840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2061532 (or 2061515 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 45.

The spelling of 26621103363840 in words is "twenty-six trillion, six hundred twenty-one billion, one hundred three million, three hundred sixty-three thousand, eight hundred forty".