650406831840 has 192 divisors, whose sum is σ = 2277513806400. Its totient is φ = 173358784512.

The previous prime is 650406831839. The next prime is 650406831853. The reversal of 650406831840 is 48138604056.

650406831840 is a `hidden beast` number, since 6 + 504 + 0 + 68 + 3 + 1 + 84 + 0 = 666.

650406831840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9265996 + ... + 9335924.

It is an arithmetic number, because the mean of its divisors is an integer number (11862051075).

Almost surely, 2^650406831840 is an apocalyptic number.

650406831840 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 650406831840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1138756903200).

650406831840 is an abundant number, since it is smaller than the sum of its proper divisors (1627106974560).

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

650406831840 is a wasteful number, since it uses less digits than its factorization.

650406831840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72106 (or 72092 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 650406831840 in words is "six hundred fifty billion, four hundred six million, eight hundred thirty-one thousand, eight hundred forty".