128250262726780 has 96 divisors (see below), whose sum is σ = 283069220442624. Its totient is φ = 48747333406464.

The previous prime is 128250262726727. The next prime is 128250262726847. The reversal of 128250262726780 is 87627262052821.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 287525409 + ... + 287971111.

It is an arithmetic number, because the mean of its divisors is an integer number (2948637712944).

Almost surely, 2^{128250262726780} is an apocalyptic number.

128250262726780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128250262726780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141534610221312).

128250262726780 is an abundant number, since it is smaller than the sum of its proper divisors (154818957715844).

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

128250262726780 is a wasteful number, since it uses less digits than its factorization.

128250262726780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454835 (or 454833 counting only the distinct ones).

The product of its (nonzero) digits is 18063360, while the sum is 58.

The spelling of 128250262726780 in words is "one hundred twenty-eight trillion, two hundred fifty billion, two hundred sixty-two million, seven hundred twenty-six thousand, seven hundred eighty".