26349578552 has 48 divisors (see below), whose sum is σ = 54352226880. Its totient is φ = 11966704640.

The previous prime is 26349578473. The next prime is 26349578569. The reversal of 26349578552 is 25587594362.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1166873 + ... + 1189239.

It is an arithmetic number, because the mean of its divisors is an integer number (1132338060).

Almost surely, 2^26349578552 is an apocalyptic number.

26349578552 is a gapful number since it is divisible by the number (22) 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 26349578552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27176113440).

26349578552 is an abundant number, since it is smaller than the sum of its proper divisors (28002648328).

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

26349578552 is a wasteful number, since it uses less digits than its factorization.

26349578552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23612 (or 23597 counting only the distinct ones).

The product of its digits is 18144000, while the sum is 56.

The spelling of 26349578552 in words is "twenty-six billion, three hundred forty-nine million, five hundred seventy-eight thousand, five hundred fifty-two".