646623285000 has 640 divisors, whose sum is σ = 2586743976960. Its totient is φ = 130723200000.

The previous prime is 646623284999. The next prime is 646623285017. The reversal of 646623285000 is 582326646.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 42727435 + ... + 42742565.

It is an arithmetic number, because the mean of its divisors is an integer number (4041787464).

Almost surely, 2^646623285000 is an apocalyptic number.

646623285000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646623285000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1293371988480).

646623285000 is an abundant number, since it is smaller than the sum of its proper divisors (1940120691960).

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

646623285000 is a wasteful number, since it uses less digits than its factorization.

646623285000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15215 (or 15196 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 646623285000 in words is "six hundred forty-six billion, six hundred twenty-three million, two hundred eighty-five thousand".