53121666603 has 24 divisors (see below), whose sum is σ = 75338197168. Its totient is φ = 33269056128.

The previous prime is 53121666601. The next prime is 53121666607. The reversal of 53121666603 is 30666612135.

It is a happy number.

53121666603 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53121666603 - 2¹ = 53121666601 is a prime.

It is a super-2 number, since 2×53121666603² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53121666601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 191176 + ... + 377877.

Almost surely, 2^53121666603 is an apocalyptic number.

53121666603 is a deficient number, since it is larger than the sum of its proper divisors (22216530565).

53121666603 is a wasteful number, since it uses less digits than its factorization.

53121666603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569151 (or 569122 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 39.

The spelling of 53121666603 in words is "fifty-three billion, one hundred twenty-one million, six hundred sixty-six thousand, six hundred three".