26745772788 has 288 divisors, whose sum is σ = 85497251840. Its totient is φ = 6878027520.

The previous prime is 26745772763. The next prime is 26745772817. The reversal of 26745772788 is 88727754762.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (63).

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 95 ways as a sum of consecutive naturals, for example, 7615953 + ... + 7619463.

Almost surely, 2^26745772788 is an apocalyptic number.

26745772788 is a gapful number since it is divisible by the number (28) 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 26745772788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42748625920).

26745772788 is an abundant number, since it is smaller than the sum of its proper divisors (58751479052).

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

26745772788 is a wasteful number, since it uses less digits than its factorization.

26745772788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3627 (or 3622 counting only the distinct ones).

The product of its digits is 73758720, while the sum is 63.

The spelling of 26745772788 in words is "twenty-six billion, seven hundred forty-five million, seven hundred seventy-two thousand, seven hundred eighty-eight".