64423635332 has 72 divisors (see below), whose sum is σ = 133228972800. Its totient is φ = 27172829376.

The previous prime is 64423635307. The next prime is 64423635359. The reversal of 64423635332 is 23353632446.

It is a self number, because there is not a number n which added to its sum of digits gives 64423635332.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23097794 + ... + 23100582.

It is an arithmetic number, because the mean of its divisors is an integer number (1850402400).

Almost surely, 2^64423635332 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 64423635332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66614486400).

64423635332 is an abundant number, since it is smaller than the sum of its proper divisors (68805337468).

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

64423635332 is a wasteful number, since it uses less digits than its factorization.

64423635332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4633 (or 4624 counting only the distinct ones).

The product of its digits is 933120, while the sum is 41.

The spelling of 64423635332 in words is "sixty-four billion, four hundred twenty-three million, six hundred thirty-five thousand, three hundred thirty-two".