128525261600 has 36 divisors (see below), whose sum is σ = 313762296834. Its totient is φ = 51410104320.

The previous prime is 128525261591. The next prime is 128525261621. The reversal of 128525261600 is 6162525821.

It can be written as a sum of positive squares in 3 ways, for example, as 70345891984 + 58179369616 = 265228^2 + 241204^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 80327489 + ... + 80329088.

Almost surely, 2^128525261600 is an apocalyptic number.

128525261600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128525261600 is an abundant number, since it is smaller than the sum of its proper divisors (185237035234).

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

128525261600 is a wasteful number, since it uses less digits than its factorization.

128525261600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160656597 (or 160656584 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 128525261600 in words is "one hundred twenty-eight billion, five hundred twenty-five million, two hundred sixty-one thousand, six hundred".