26164019840 has 256 divisors, whose sum is σ = 77007421440. Its totient is φ = 8302694400.

The previous prime is 26164019807. The next prime is 26164019867. The reversal of 26164019840 is 4891046162.

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, 3190145 + ... + 3198335.

It is an arithmetic number, because the mean of its divisors is an integer number (300810240).

Almost surely, 2^26164019840 is an apocalyptic number.

26164019840 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 26164019840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38503710720).

26164019840 is an abundant number, since it is smaller than the sum of its proper divisors (50843401600).

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

26164019840 is a wasteful number, since it uses less digits than its factorization.

26164019840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8271 (or 8259 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The spelling of 26164019840 in words is "twenty-six billion, one hundred sixty-four million, nineteen thousand, eight hundred forty".