26471744640 has 384 divisors, whose sum is σ = 101614668480. Its totient is φ = 6295511040.

The previous prime is 26471744597. The next prime is 26471744749. The reversal of 26471744640 is 4644717462.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3354139 + ... + 3362021.

Almost surely, 2^26471744640 is an apocalyptic number.

26471744640 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 26471744640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50807334240).

26471744640 is an abundant number, since it is smaller than the sum of its proper divisors (75142923840).

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

26471744640 is a wasteful number, since it uses less digits than its factorization.

26471744640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7972 (or 7957 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 45.

The spelling of 26471744640 in words is "twenty-six billion, four hundred seventy-one million, seven hundred forty-four thousand, six hundred forty".