53121666604 has 12 divisors (see below), whose sum is σ = 93519581904. Its totient is φ = 26401786064.

The previous prime is 53121666601. The next prime is 53121666607. The reversal of 53121666604 is 40666612135.

It is an interprime number because it is at equal distance from previous prime (53121666601) and next prime (53121666607).

It is a super-2 number, since 2×53121666604² (a number of 22 digits) contains 22 as substring.

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

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 3 ways as a sum of consecutive naturals, for example, 39761059 + ... + 39762394.

It is an arithmetic number, because the mean of its divisors is an integer number (7793298492).

Almost surely, 2^53121666604 is an apocalyptic number.

It is an amenable number.

53121666604 is a deficient number, since it is larger than the sum of its proper divisors (40397915300).

53121666604 is a wasteful number, since it uses less digits than its factorization.

53121666604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79523624 (or 79523622 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 53121666604 in words is "fifty-three billion, one hundred twenty-one million, six hundred sixty-six thousand, six hundred four".