64533172100 has 18 divisors (see below), whose sum is σ = 140036983674. Its totient is φ = 25813268800.

The previous prime is 64533172063. The next prime is 64533172157. The reversal of 64533172100 is 127133546.

It can be written as a sum of positive squares in 3 ways, for example, as 616230976 + 63916941124 = 24824^2 + 252818^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 322665761 + ... + 322665960.

Almost surely, 2^64533172100 is an apocalyptic number.

It is an amenable number.

64533172100 is an abundant number, since it is smaller than the sum of its proper divisors (75503811574).

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

64533172100 is a wasteful number, since it uses less digits than its factorization.

64533172100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645331735 (or 645331728 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The spelling of 64533172100 in words is "sixty-four billion, five hundred thirty-three million, one hundred seventy-two thousand, one hundred".