128601868476250 has 40 divisors (see below), whose sum is σ = 259593753248676. Its totient is φ = 47483766816000.

The previous prime is 128601868476247. The next prime is 128601868476259. The reversal of 128601868476250 is 52674868106821.

It can be written as a sum of positive squares in 10 ways, for example, as 12875114652481 + 115726753823769 = 3588191^2 + 10757637^2 .

It is not an unprimeable number, because it can be changed into a prime (128601868476259) 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, 3956964319 + ... + 3956996818.

Almost surely, 2^{128601868476250} is an apocalyptic number.

128601868476250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128601868476250 is an abundant number, since it is smaller than the sum of its proper divisors (130991884772426).

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

128601868476250 is an equidigital number, since it uses as much as digits as its factorization.

128601868476250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7913961172 (or 7913961157 counting only the distinct ones).

The product of its (nonzero) digits is 61931520, while the sum is 64.

The spelling of 128601868476250 in words is "one hundred twenty-eight trillion, six hundred one billion, eight hundred sixty-eight million, four hundred seventy-six thousand, two hundred fifty".