6451991952 has 40 divisors (see below), whose sum is σ = 19048739136. Its totient is φ = 1843426176.

The previous prime is 6451991911. The next prime is 6451991977. The reversal of 6451991952 is 2591991546.

It is a junction number, because it is equal to n+sod(n) for n = 6451991895 and 6451991904.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9600843 + ... + 9601514.

Almost surely, 2^6451991952 is an apocalyptic number.

It is an amenable number.

6451991952 is an abundant number, since it is smaller than the sum of its proper divisors (12596747184).

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

6451991952 is a wasteful number, since it uses less digits than its factorization.

6451991952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19202375 (or 19202369 counting only the distinct ones).

The product of its digits is 874800, while the sum is 51.

The square root of 6451991952 is about 80324.2924151841. The cubic root of 6451991952 is about 1861.6495898863.

The spelling of 6451991952 in words is "six billion, four hundred fifty-one million, nine hundred ninety-one thousand, nine hundred fifty-two".