53412581665 has 8 divisors (see below), whose sum is σ = 64683127080. Its totient is φ = 42338045952.

The previous prime is 53412581659. The next prime is 53412581687. The reversal of 53412581665 is 56618521435.

It can be written as a sum of positive squares in 4 ways, for example, as 22669518096 + 30743063569 = 150564^2 + 175337^2 .

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 53412581665 - 2²⁷ = 53278363937 is a prime.

It is an unprimeable number.

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, 49001824 + ... + 49002913.

It is an arithmetic number, because the mean of its divisors is an integer number (8085390885).

Almost surely, 2^53412581665 is an apocalyptic number.

It is an amenable number.

53412581665 is a deficient number, since it is larger than the sum of its proper divisors (11270545415).

53412581665 is a wasteful number, since it uses less digits than its factorization.

53412581665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98004851.

The product of its digits is 864000, while the sum is 46.

The spelling of 53412581665 in words is "fifty-three billion, four hundred twelve million, five hundred eighty-one thousand, six hundred sixty-five".