651566243616 has 72 divisors (see below), whose sum is σ = 1771373311344. Its totient is φ = 209699454720.

The previous prime is 651566243611. The next prime is 651566243621. The reversal of 651566243616 is 616342665156.

It is an interprime number because it is at equal distance from previous prime (651566243611) and next prime (651566243621).

It is not an unprimeable number, because it can be changed into a prime (651566243611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3954430 + ... + 4115901.

It is an arithmetic number, because the mean of its divisors is an integer number (24602407102).

Almost surely, 2^651566243616 is an apocalyptic number.

It is an amenable number.

651566243616 is an abundant number, since it is smaller than the sum of its proper divisors (1119807067728).

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

651566243616 is a wasteful number, since it uses less digits than its factorization.

651566243616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8070402 (or 8070365 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 51.

The spelling of 651566243616 in words is "six hundred fifty-one billion, five hundred sixty-six million, two hundred forty-three thousand, six hundred sixteen".