128884722050 has 54 divisors (see below), whose sum is σ = 278902907163. Its totient is φ = 44182955040.

The previous prime is 128884722047. The next prime is 128884722053. The reversal of 128884722050 is 50227488821.

It is an interprime number because it is at equal distance from previous prime (128884722047) and next prime (128884722053).

It can be written as a sum of positive squares in 5 ways, for example, as 76812676801 + 52072045249 = 277151^2 + 228193^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=253855.

It is a super-2 number, since 2×128884722050² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128884721986 and 128884722004.

It is not an unprimeable number, because it can be changed into a prime (128884722053) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 17766224 + ... + 17773476.

Almost surely, 2^128884722050 is an apocalyptic number.

128884722050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128884722050 is an abundant number, since it is smaller than the sum of its proper divisors (150018185113).

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

128884722050 is an frugal number, since it uses more digits than its factorization.

128884722050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14532 (or 7267 counting only the distinct ones).

The product of its (nonzero) digits is 573440, while the sum is 47.

The spelling of 128884722050 in words is "one hundred twenty-eight billion, eight hundred eighty-four million, seven hundred twenty-two thousand, fifty".