651533448491 has 4 divisors (see below), whose sum is σ = 651535986192. Its totient is φ = 651530910792.

The previous prime is 651533448457. The next prime is 651533448493. The reversal of 651533448491 is 194844335156.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 651533448491 - 2⁶ = 651533448427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651533448493) 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 3 ways as a sum of consecutive naturals, for example, 834080 + ... + 1413773.

It is an arithmetic number, because the mean of its divisors is an integer number (162883996548).

Almost surely, 2^651533448491 is an apocalyptic number.

651533448491 is a deficient number, since it is larger than the sum of its proper divisors (2537701).

651533448491 is a wasteful number, since it uses less digits than its factorization.

651533448491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2537700.

The product of its digits is 6220800, while the sum is 53.

The spelling of 651533448491 in words is "six hundred fifty-one billion, five hundred thirty-three million, four hundred forty-eight thousand, four hundred ninety-one".