64536541128 has 64 divisors (see below), whose sum is σ = 181793116800. Its totient is φ = 21209186880.

The previous prime is 64536541103. The next prime is 64536541151. The reversal of 64536541128 is 82114563546.

64536541128 is a `hidden beast` number, since 64 + 5 + 36 + 541 + 12 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2088751 + ... + 2119422.

It is an arithmetic number, because the mean of its divisors is an integer number (2840517450).

Almost surely, 2^64536541128 is an apocalyptic number.

It is an amenable number.

64536541128 is an abundant number, since it is smaller than the sum of its proper divisors (117256575672).

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

64536541128 is a wasteful number, since it uses less digits than its factorization.

64536541128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4208259 (or 4208249 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The spelling of 64536541128 in words is "sixty-four billion, five hundred thirty-six million, five hundred forty-one thousand, one hundred twenty-eight".