26628977440 has 96 divisors (see below), whose sum is σ = 67856564160. Its totient is φ = 9816812544.

The previous prime is 26628977387. The next prime is 26628977503. The reversal of 26628977440 is 4477982662.

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 15 ways as a sum of consecutive naturals, for example, 1361007 + ... + 1380433.

It is an arithmetic number, because the mean of its divisors is an integer number (706839210).

Almost surely, 2^26628977440 is an apocalyptic number.

26628977440 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 26628977440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33928282080).

26628977440 is an abundant number, since it is smaller than the sum of its proper divisors (41227586720).

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

26628977440 is a wasteful number, since it uses less digits than its factorization.

26628977440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20114 (or 20106 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 55.

The spelling of 26628977440 in words is "twenty-six billion, six hundred twenty-eight million, nine hundred seventy-seven thousand, four hundred forty".