26721346560 has 352 divisors, whose sum is σ = 88444548864. Its totient is φ = 6881280000.

The previous prime is 26721346543. The next prime is 26721346573. The reversal of 26721346560 is 6564312762.

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, 95093620 + ... + 95093900.

Almost surely, 2^26721346560 is an apocalyptic number.

26721346560 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 26721346560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44222274432).

26721346560 is an abundant number, since it is smaller than the sum of its proper divisors (61723202304).

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

26721346560 is a wasteful number, since it uses less digits than its factorization.

26721346560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501 (or 483 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 26721346560 in words is "twenty-six billion, seven hundred twenty-one million, three hundred forty-six thousand, five hundred sixty".