128247881742 has 40 divisors (see below), whose sum is σ = 295137030936. Its totient is φ = 41593905648.

The previous prime is 128247881719. The next prime is 128247881743. The reversal of 128247881742 is 247188742821.

128247881742 is a `hidden beast` number, since 1 + 28 + 2 + 478 + 81 + 74 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128247881743) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10692028 + ... + 10704015.

Almost surely, 2^128247881742 is an apocalyptic number.

128247881742 is an abundant number, since it is smaller than the sum of its proper divisors (166889149194).

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

128247881742 is a wasteful number, since it uses less digits than its factorization.

128247881742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21396094 (or 21396085 counting only the distinct ones).

The product of its digits is 3211264, while the sum is 54.

The spelling of 128247881742 in words is "one hundred twenty-eight billion, two hundred forty-seven million, eight hundred eighty-one thousand, seven hundred forty-two".