64631623600 has 120 divisors (see below), whose sum is σ = 164398116240. Its totient is φ = 24349916160.

The previous prime is 64631623591. The next prime is 64631623603. The reversal of 64631623600 is 632613646.

It is a self number, because there is not a number n which added to its sum of digits gives 64631623600.

It is not an unprimeable number, because it can be changed into a prime (64631623603) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1290222 + ... + 1339378.

It is an arithmetic number, because the mean of its divisors is an integer number (1369984302).

Almost surely, 2^64631623600 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 64631623600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82199058120).

64631623600 is an abundant number, since it is smaller than the sum of its proper divisors (99766492640).

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

64631623600 is a wasteful number, since it uses less digits than its factorization.

64631623600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49367 (or 49356 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 37.

The spelling of 64631623600 in words is "sixty-four billion, six hundred thirty-one million, six hundred twenty-three thousand, six hundred".