128475531952 has 20 divisors (see below), whose sum is σ = 249846709680. Its totient is φ = 63998961728.

The previous prime is 128475531949. The next prime is 128475531971. The reversal of 128475531952 is 259135574821.

It is a self number, because there is not a number n which added to its sum of digits gives 128475531952.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14920828 + ... + 14929435.

It is an arithmetic number, because the mean of its divisors is an integer number (12492335484).

Almost surely, 2^128475531952 is an apocalyptic number.

It is an amenable number.

128475531952 is a deficient number, since it is larger than the sum of its proper divisors (121371177728).

128475531952 is a wasteful number, since it uses less digits than its factorization.

128475531952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29850540 (or 29850534 counting only the distinct ones).

The product of its digits is 3024000, while the sum is 52.

The spelling of 128475531952 in words is "one hundred twenty-eight billion, four hundred seventy-five million, five hundred thirty-one thousand, nine hundred fifty-two".