56201871909 has 8 divisors (see below), whose sum is σ = 74942968320. Its totient is φ = 37464345056.

The previous prime is 56201871899. The next prime is 56201871917. The reversal of 56201871909 is 90917810265.

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

It is a cyclic number.

It is not a de Polignac number, because 56201871909 - 2¹³ = 56201863717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56201871949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 855432 + ... + 918785.

It is an arithmetic number, because the mean of its divisors is an integer number (9367871040).

Almost surely, 2^56201871909 is an apocalyptic number.

It is an amenable number.

56201871909 is a deficient number, since it is larger than the sum of its proper divisors (18741096411).

56201871909 is a wasteful number, since it uses less digits than its factorization.

56201871909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784779.

The product of its (nonzero) digits is 272160, while the sum is 48.

The spelling of 56201871909 in words is "fifty-six billion, two hundred one million, eight hundred seventy-one thousand, nine hundred nine".