53205565615 has 16 divisors (see below), whose sum is σ = 64170592416. Its totient is φ = 42348880000.

The previous prime is 53205565571. The next prime is 53205565687. The reversal of 53205565615 is 51656550235.

It is not a de Polignac number, because 53205565615 - 2¹³ = 53205557423 is a prime.

It is a super-4 number, since 4×53205565615⁴ (a number of 44 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1158429 + ... + 1203481.

It is an arithmetic number, because the mean of its divisors is an integer number (4010662026).

Almost surely, 2^53205565615 is an apocalyptic number.

53205565615 is a deficient number, since it is larger than the sum of its proper divisors (10965026801).

53205565615 is a wasteful number, since it uses less digits than its factorization.

53205565615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46250.

The product of its (nonzero) digits is 675000, while the sum is 43.

The spelling of 53205565615 in words is "fifty-three billion, two hundred five million, five hundred sixty-five thousand, six hundred fifteen".