128257873618630 has 96 divisors (see below), whose sum is σ = 269197903125504. Its totient is φ = 43869093637824.

The previous prime is 128257873618607. The next prime is 128257873618631. The reversal of 128257873618630 is 36816378752821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128257873618631) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1854394429 + ... + 1854463591.

It is an arithmetic number, because the mean of its divisors is an integer number (2804144824224).

Almost surely, 2^{128257873618630} is an apocalyptic number.

128257873618630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128257873618630 is an abundant number, since it is smaller than the sum of its proper divisors (140940029506874).

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

128257873618630 is a wasteful number, since it uses less digits than its factorization.

128257873618630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78170 (or 78163 counting only the distinct ones).

The product of its (nonzero) digits is 162570240, while the sum is 67.

The spelling of 128257873618630 in words is "one hundred twenty-eight trillion, two hundred fifty-seven billion, eight hundred seventy-three million, six hundred eighteen thousand, six hundred thirty".