26644320220340 has 48 divisors (see below), whose sum is σ = 57245062839552. Its totient is φ = 10412440235136.

The previous prime is 26644320220339. The next prime is 26644320220361. The reversal of 26644320220340 is 4302202344662.

It is a super-2 number, since 2×26644320220340² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26644320220294 and 26644320220303.

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, 24643979 + ... + 25702418.

It is an arithmetic number, because the mean of its divisors is an integer number (1192605475824).

Almost surely, 2^{26644320220340} is an apocalyptic number.

26644320220340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26644320220340 is an abundant number, since it is smaller than the sum of its proper divisors (30600742619212).

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

26644320220340 is a wasteful number, since it uses less digits than its factorization.

26644320220340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50347016 (or 50347014 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 38.

The spelling of 26644320220340 in words is "twenty-six trillion, six hundred forty-four billion, three hundred twenty million, two hundred twenty thousand, three hundred forty".