646009949592 has 288 divisors, whose sum is σ = 2075380669440. Its totient is φ = 177645052800.

The previous prime is 646009949581. The next prime is 646009949633. The reversal of 646009949592 is 295949900646.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1147441903 + ... + 1147442465.

It is an arithmetic number, because the mean of its divisors is an integer number (7206182880).

Almost surely, 2^646009949592 is an apocalyptic number.

646009949592 is a gapful number since it is divisible by the number (62) 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 646009949592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1037690334720).

646009949592 is an abundant number, since it is smaller than the sum of its proper divisors (1429370719848).

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

646009949592 is a wasteful number, since it uses less digits than its factorization.

646009949592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155 (or 877 counting only the distinct ones).

The product of its (nonzero) digits is 37791360, while the sum is 63.

The spelling of 646009949592 in words is "six hundred forty-six billion, nine million, nine hundred forty-nine thousand, five hundred ninety-two".