53185973965 has 8 divisors (see below), whose sum is σ = 63965316600. Its totient is φ = 42454013952.

The previous prime is 53185973923. The next prime is 53185974001. The reversal of 53185973965 is 56937958135.

It can be written as a sum of positive squares in 4 ways, for example, as 1397413924 + 51788560041 = 37382^2 + 227571^2 .

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 53185973965 - 2³¹ = 51038490317 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11843184 + ... + 11847673.

It is an arithmetic number, because the mean of its divisors is an integer number (7995664575).

Almost surely, 2^53185973965 is an apocalyptic number.

It is an amenable number.

53185973965 is a deficient number, since it is larger than the sum of its proper divisors (10779342635).

53185973965 is a wasteful number, since it uses less digits than its factorization.

53185973965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23691311.

The product of its digits is 30618000, while the sum is 61.

The spelling of 53185973965 in words is "fifty-three billion, one hundred eighty-five million, nine hundred seventy-three thousand, nine hundred sixty-five".