128621206270 has 64 divisors (see below), whose sum is σ = 258428952576. Its totient is φ = 45862986240.

The previous prime is 128621206267. The next prime is 128621206327. The reversal of 128621206270 is 72602126821.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11952 + ... + 507331.

It is an arithmetic number, because the mean of its divisors is an integer number (4037952384).

Almost surely, 2^128621206270 is an apocalyptic number.

128621206270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128621206270 is an abundant number, since it is smaller than the sum of its proper divisors (129807746306).

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

128621206270 is a wasteful number, since it uses less digits than its factorization.

128621206270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519385.

The product of its (nonzero) digits is 32256, while the sum is 37.

The spelling of 128621206270 in words is "one hundred twenty-eight billion, six hundred twenty-one million, two hundred six thousand, two hundred seventy".