9618281328128 has 80 divisors (see below), whose sum is σ = 20965873991040. Its totient is φ = 4371732019200.

The previous prime is 9618281328113. The next prime is 9618281328143. The reversal of 9618281328128 is 8218231828169.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9618281328113) and next prime (9618281328143).

It is a super-2 number, since 2×9618281328128² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199861253 + ... + 199909371.

It is an arithmetic number, because the mean of its divisors is an integer number (262073424888).

Almost surely, 2^{9618281328128} is an apocalyptic number.

It is an amenable number.

9618281328128 is an abundant number, since it is smaller than the sum of its proper divisors (11347592662912).

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

9618281328128 is a wasteful number, since it uses less digits than its factorization.

9618281328128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83639 (or 83623 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 59.

The spelling of 9618281328128 in words is "nine trillion, six hundred eighteen billion, two hundred eighty-one million, three hundred twenty-eight thousand, one hundred twenty-eight".