51911726473 has 8 divisors (see below), whose sum is σ = 54968771880. Its totient is φ = 48855060480.

The previous prime is 51911726443. The next prime is 51911726483. The reversal of 51911726473 is 37462711915.

It can be written as a sum of positive squares in 4 ways, for example, as 1683296784 + 50228429689 = 41028^2 + 224117^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51911726473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51911726443) 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, 215973 + ... + 387901.

It is an arithmetic number, because the mean of its divisors is an integer number (6871096485).

Almost surely, 2^51911726473 is an apocalyptic number.

It is an amenable number.

51911726473 is a deficient number, since it is larger than the sum of its proper divisors (3057045407).

51911726473 is a wasteful number, since it uses less digits than its factorization.

51911726473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189707.

The product of its digits is 317520, while the sum is 46.

The spelling of 51911726473 in words is "fifty-one billion, nine hundred eleven million, seven hundred twenty-six thousand, four hundred seventy-three".