128290949466 has 16 divisors (see below), whose sum is σ = 256643376384. Its totient is φ = 42753403584.

The previous prime is 128290949461. The next prime is 128290949467. The reversal of 128290949466 is 664949092821.

It is not an unprimeable number, because it can be changed into a prime (128290949461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2534410 + ... + 2584533.

It is an arithmetic number, because the mean of its divisors is an integer number (16040211024).

Almost surely, 2^128290949466 is an apocalyptic number.

128290949466 is an abundant number, since it is smaller than the sum of its proper divisors (128352426918).

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

128290949466 is a wasteful number, since it uses less digits than its factorization.

128290949466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5123125.

The product of its (nonzero) digits is 13436928, while the sum is 60.

The spelling of 128290949466 in words is "one hundred twenty-eight billion, two hundred ninety million, nine hundred forty-nine thousand, four hundred sixty-six".