26557820652 has 96 divisors (see below), whose sum is σ = 70766051328. Its totient is φ = 7678440000.

The previous prime is 26557820633. The next prime is 26557820687. The reversal of 26557820652 is 25602875562.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 244827 + ... + 336237.

It is an arithmetic number, because the mean of its divisors is an integer number (737146368).

Almost surely, 2^26557820652 is an apocalyptic number.

26557820652 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 26557820652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35383025664).

26557820652 is an abundant number, since it is smaller than the sum of its proper divisors (44208230676).

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

26557820652 is a wasteful number, since it uses less digits than its factorization.

26557820652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91531 (or 91529 counting only the distinct ones).

The product of its (nonzero) digits is 2016000, while the sum is 48.

The spelling of 26557820652 in words is "twenty-six billion, five hundred fifty-seven million, eight hundred twenty thousand, six hundred fifty-two".