26694962640 has 200 divisors, whose sum is σ = 98169821640. Its totient is φ = 6699884544.

The previous prime is 26694962629. The next prime is 26694962681. The reversal of 26694962640 is 4626949662.

26694962640 is a `hidden beast` number, since 2 + 6 + 6 + 9 + 4 + 9 + 626 + 4 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5152942656 + 21542019984 = 71784^2 + 146772^2 .

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11005 + ... + 231324.

Almost surely, 2^26694962640 is an apocalyptic number.

26694962640 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 26694962640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49084910820).

26694962640 is an abundant number, since it is smaller than the sum of its proper divisors (71474859000).

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

26694962640 is a wasteful number, since it uses less digits than its factorization.

26694962640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242371 (or 242356 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 54.

The spelling of 26694962640 in words is "twenty-six billion, six hundred ninety-four million, nine hundred sixty-two thousand, six hundred forty".