26587356721648 has 80 divisors (see below), whose sum is σ = 54406146283776. Its totient is φ = 12561146357760.

The previous prime is 26587356721637. The next prime is 26587356721657. The reversal of 26587356721648 is 84612765378562.

It is a super-2 number, since 2×26587356721648² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 321617536 + ... + 321700192.

Almost surely, 2^{26587356721648} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26587356721648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27203073141888).

26587356721648 is an abundant number, since it is smaller than the sum of its proper divisors (27818789562128).

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

26587356721648 is a wasteful number, since it uses less digits than its factorization.

26587356721648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93302 (or 93296 counting only the distinct ones).

The product of its digits is 812851200, while the sum is 70.

The spelling of 26587356721648 in words is "twenty-six trillion, five hundred eighty-seven billion, three hundred fifty-six million, seven hundred twenty-one thousand, six hundred forty-eight".