53671665203545 has 4 divisors (see below), whose sum is σ = 64405998244260. Its totient is φ = 42937332162832.

The previous prime is 53671665203489. The next prime is 53671665203561. The reversal of 53671665203545 is 54530256617635.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30752581341001 + 22919083862544 = 5545501^2 + 4787388^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53671665203545 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53671665203545.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5367166520350 + ... + 5367166520359.

It is an arithmetic number, because the mean of its divisors is an integer number (16101499561065).

Almost surely, 2^{53671665203545} is an apocalyptic number.

It is an amenable number.

53671665203545 is a deficient number, since it is larger than the sum of its proper divisors (10734333040715).

53671665203545 is a wasteful number, since it uses less digits than its factorization.

53671665203545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10734333040714.

The product of its (nonzero) digits is 68040000, while the sum is 58.

The spelling of 53671665203545 in words is "fifty-three trillion, six hundred seventy-one billion, six hundred sixty-five million, two hundred three thousand, five hundred forty-five".