64473533500 has 96 divisors (see below), whose sum is σ = 144293909760. Its totient is φ = 25153128000.

The previous prime is 64473533471. The next prime is 64473533503. The reversal of 64473533500 is 533537446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64473533503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18466755 + ... + 18470245.

It is an arithmetic number, because the mean of its divisors is an integer number (1503061560).

Almost surely, 2^64473533500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64473533500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72146954880).

64473533500 is an abundant number, since it is smaller than the sum of its proper divisors (79820376260).

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

64473533500 is a wasteful number, since it uses less digits than its factorization.

64473533500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4412 (or 4400 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 40.

The spelling of 64473533500 in words is "sixty-four billion, four hundred seventy-three million, five hundred thirty-three thousand, five hundred".