128091549040 has 240 divisors, whose sum is σ = 375521375808. Its totient is φ = 39772422144.

The previous prime is 128091549031. The next prime is 128091549049. The reversal of 128091549040 is 40945190821.

It is an interprime number because it is at equal distance from previous prime (128091549031) and next prime (128091549049).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128091549049) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5003152 + ... + 5028688.

Almost surely, 2^128091549040 is an apocalyptic number.

128091549040 is a gapful number since it is divisible by the number (10) 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 128091549040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187760687904).

128091549040 is an abundant number, since it is smaller than the sum of its proper divisors (247429826768).

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

128091549040 is a wasteful number, since it uses less digits than its factorization.

128091549040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25636 (or 25617 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 128091549040 in words is "one hundred twenty-eight billion, ninety-one million, five hundred forty-nine thousand, forty".