651403816 has 32 divisors (see below), whose sum is σ = 1411560000. Its totient is φ = 276034176.

The previous prime is 651403783. The next prime is 651403817. The reversal of 651403816 is 618304156.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (651403817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60366 + ... + 70333.

It is an arithmetic number, because the mean of its divisors is an integer number (44111250).

Almost surely, 2^651403816 is an apocalyptic number.

It is an amenable number.

651403816 is an abundant number, since it is smaller than the sum of its proper divisors (760156184).

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

651403816 is a wasteful number, since it uses less digits than its factorization.

651403816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130801 (or 130797 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 651403816 is about 25522.6138159868. The cubic root of 651403816 is about 866.8622673565.

The spelling of 651403816 in words is "six hundred fifty-one million, four hundred three thousand, eight hundred sixteen".