651650820 has 48 divisors (see below), whose sum is σ = 1825746048. Its totient is φ = 173666560.

The previous prime is 651650819. The next prime is 651650833. The reversal of 651650820 is 28056156.

651650820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164665 + ... + 168575.

It is an arithmetic number, because the mean of its divisors is an integer number (38036376).

Almost surely, 2^651650820 is an apocalyptic number.

651650820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

651650820 is an abundant number, since it is smaller than the sum of its proper divisors (1174095228).

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

651650820 is a wasteful number, since it uses less digits than its factorization.

651650820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6700 (or 6698 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 651650820 is about 25527.4522818083. The cubic root of 651650820 is about 866.9718212074.

The spelling of 651650820 in words is "six hundred fifty-one million, six hundred fifty thousand, eight hundred twenty".