128121058560 has 144 divisors (see below), whose sum is σ = 446385562560. Its totient is φ = 31059640320.

The previous prime is 128121058553. The next prime is 128121058567. The reversal of 128121058560 is 65850121821.

It is an interprime number because it is at equal distance from previous prime (128121058553) and next prime (128121058567).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128121058567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1474345 + ... + 1558824.

It is an arithmetic number, because the mean of its divisors is an integer number (3099899740).

Almost surely, 2^128121058560 is an apocalyptic number.

128121058560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128121058560 is an abundant number, since it is smaller than the sum of its proper divisors (318264504000).

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

128121058560 is a wasteful number, since it uses less digits than its factorization.

128121058560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3033204 (or 3033190 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 39.

The spelling of 128121058560 in words is "one hundred twenty-eight billion, one hundred twenty-one million, fifty-eight thousand, five hundred sixty".