651021964992 has 168 divisors, whose sum is σ = 2184629140512. Its totient is φ = 181469491200.

The previous prime is 651021964981. The next prime is 651021965003. The reversal of 651021964992 is 299469120156.

651021964992 is a `hidden beast` number, since 65 + 1 + 0 + 2 + 1 + 96 + 499 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (651021964981) and next prime (651021965003).

It is a tau number, because it is divible by the number of its divisors (168).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1803759 + ... + 2134382.

It is an arithmetic number, because the mean of its divisors is an integer number (13003744884).

Almost surely, 2^651021964992 is an apocalyptic number.

It is an amenable number.

651021964992 is an abundant number, since it is smaller than the sum of its proper divisors (1533607175520).

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

651021964992 is a wasteful number, since it uses less digits than its factorization.

651021964992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3938207 (or 3938194 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The spelling of 651021964992 in words is "six hundred fifty-one billion, twenty-one million, nine hundred sixty-four thousand, nine hundred ninety-two".