128776625390 has 32 divisors (see below), whose sum is σ = 273457465344. Its totient is φ = 42727727520.

The previous prime is 128776625371. The next prime is 128776625437. The reversal of 128776625390 is 93526677821.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29669864 + ... + 29674203.

It is an arithmetic number, because the mean of its divisors is an integer number (8545545792).

Almost surely, 2^128776625390 is an apocalyptic number.

128776625390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128776625390 is an abundant number, since it is smaller than the sum of its proper divisors (144680839954).

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

128776625390 is a wasteful number, since it uses less digits than its factorization.

128776625390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59344112.

The product of its (nonzero) digits is 7620480, while the sum is 56.

The spelling of 128776625390 in words is "one hundred twenty-eight billion, seven hundred seventy-six million, six hundred twenty-five thousand, three hundred ninety".