53661775653 has 24 divisors (see below), whose sum is σ = 82049029920. Its totient is φ = 33737628960.

The previous prime is 53661775633. The next prime is 53661775667. The reversal of 53661775653 is 35657716635.

53661775653 is a `hidden beast` number, since 5 + 3 + 6 + 6 + 1 + 77 + 565 + 3 = 666.

It is not a de Polignac number, because 53661775653 - 2²⁸ = 53393340197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53661775653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53661775633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2379483 + ... + 2401928.

It is an arithmetic number, because the mean of its divisors is an integer number (3418709580).

Almost surely, 2^53661775653 is an apocalyptic number.

It is an amenable number.

53661775653 is a deficient number, since it is larger than the sum of its proper divisors (28387254267).

53661775653 is a wasteful number, since it uses less digits than its factorization.

53661775653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4781489 (or 4781486 counting only the distinct ones).

The product of its digits is 11907000, while the sum is 54.

The spelling of 53661775653 in words is "fifty-three billion, six hundred sixty-one million, seven hundred seventy-five thousand, six hundred fifty-three".