26446621530 has 192 divisors, whose sum is σ = 78840926208. Its totient is φ = 5647340160.

The previous prime is 26446621471. The next prime is 26446621559. The reversal of 26446621530 is 3512664462.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1444735 + ... + 1462925.

It is an arithmetic number, because the mean of its divisors is an integer number (410629824).

Almost surely, 2^26446621530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26446621530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39420463104).

26446621530 is an abundant number, since it is smaller than the sum of its proper divisors (52394304678).

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

26446621530 is a wasteful number, since it uses less digits than its factorization.

26446621530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18281 (or 18274 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 39.

The spelling of 26446621530 in words is "twenty-six billion, four hundred forty-six million, six hundred twenty-one thousand, five hundred thirty".