26799776640 has 1920 divisors, whose sum is σ = 130094553600. Its totient is φ = 5123948544.

The previous prime is 26799776609. The next prime is 26799776651. The reversal of 26799776640 is 4667799762.

It is a tau number, because it is divible by the number of its divisors (1920).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 1165207669 + ... + 1165207691.

It is an arithmetic number, because the mean of its divisors is an integer number (67757580).

Almost surely, 2^26799776640 is an apocalyptic number.

26799776640 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 26799776640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65047276800).

26799776640 is an abundant number, since it is smaller than the sum of its proper divisors (103294776960).

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

26799776640 is a wasteful number, since it uses less digits than its factorization.

26799776640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 48009024, while the sum is 63.

The spelling of 26799776640 in words is "twenty-six billion, seven hundred ninety-nine million, seven hundred seventy-six thousand, six hundred forty".