651543660994 has 8 divisors (see below), whose sum is σ = 977322466368. Its totient is φ = 325769505540.

The previous prime is 651543660983. The next prime is 651543661039. The reversal of 651543660994 is 499066345156.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 788062 + ... + 1387129.

It is an arithmetic number, because the mean of its divisors is an integer number (122165308296).

Almost surely, 2^651543660994 is an apocalyptic number.

651543660994 is a deficient number, since it is larger than the sum of its proper divisors (325778805374).

651543660994 is a wasteful number, since it uses less digits than its factorization.

651543660994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2324960.

The product of its (nonzero) digits is 20995200, while the sum is 58.

The spelling of 651543660994 in words is "six hundred fifty-one billion, five hundred forty-three million, six hundred sixty thousand, nine hundred ninety-four".