651312816 has 80 divisors (see below), whose sum is σ = 2097746688. Its totient is φ = 169171200.

The previous prime is 651312811. The next prime is 651312841. The reversal of 651312816 is 618213156.

651312816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (651312811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84415 + ... + 91806.

Almost surely, 2^651312816 is an apocalyptic number.

651312816 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

651312816 is an abundant number, since it is smaller than the sum of its proper divisors (1446433872).

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

651312816 is a wasteful number, since it uses less digits than its factorization.

651312816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176250 (or 176244 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 651312816 is about 25520.8310209523. The cubic root of 651312816 is about 866.8218990842.

The spelling of 651312816 in words is "six hundred fifty-one million, three hundred twelve thousand, eight hundred sixteen".