56203991961 has 8 divisors (see below), whose sum is σ = 80703168000. Its totient is φ = 34587071952.

The previous prime is 56203991959. The next prime is 56203992001. The reversal of 56203991961 is 16919930265.

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

It is not a de Polignac number, because 56203991961 - 2¹ = 56203991959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56203991161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 720563961 + ... + 720564038.

It is an arithmetic number, because the mean of its divisors is an integer number (10087896000).

Almost surely, 2^56203991961 is an apocalyptic number.

It is an amenable number.

56203991961 is a deficient number, since it is larger than the sum of its proper divisors (24499176039).

56203991961 is a wasteful number, since it uses less digits than its factorization.

56203991961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441128015.

The product of its (nonzero) digits is 787320, while the sum is 51.

The spelling of 56203991961 in words is "fifty-six billion, two hundred three million, nine hundred ninety-one thousand, nine hundred sixty-one".