650811157920 has 768 divisors, whose sum is σ = 2931559464960. Its totient is φ = 130869043200.

The previous prime is 650811157907. The next prime is 650811157921. The reversal of 650811157920 is 29751118056.

650811157920 is a `hidden beast` number, since 6 + 50 + 8 + 1 + 1 + 1 + 579 + 20 = 666.

650811157920 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 not an unprimeable number, because it can be changed into a prime (650811157921) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 10280284 + ... + 10343396.

It is an arithmetic number, because the mean of its divisors is an integer number (3817134720).

Almost surely, 2^650811157920 is an apocalyptic number.

650811157920 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 650811157920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1465779732480).

650811157920 is an abundant number, since it is smaller than the sum of its proper divisors (2280748307040).

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

650811157920 is a wasteful number, since it uses less digits than its factorization.

650811157920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63186 (or 63172 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 45.

The spelling of 650811157920 in words is "six hundred fifty billion, eight hundred eleven million, one hundred fifty-seven thousand, nine hundred twenty".