53061212665 has 4 divisors (see below), whose sum is σ = 63673455204. Its totient is φ = 42448970128.

The previous prime is 53061212663. The next prime is 53061212669. The reversal of 53061212665 is 56621216035.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56621216035 = 5 ⋅11324243207.

It can be written as a sum of positive squares in 2 ways, for example, as 14750588304 + 38310624361 = 121452^2 + 195731^2 .

It is a cyclic number.

It is not a de Polignac number, because 53061212665 - 2¹ = 53061212663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53061212663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5306121262 + ... + 5306121271.

It is an arithmetic number, because the mean of its divisors is an integer number (15918363801).

Almost surely, 2^53061212665 is an apocalyptic number.

It is an amenable number.

53061212665 is a deficient number, since it is larger than the sum of its proper divisors (10612242539).

53061212665 is a wasteful number, since it uses less digits than its factorization.

53061212665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10612242538.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 53061212665 in words is "fifty-three billion, sixty-one million, two hundred twelve thousand, six hundred sixty-five".