55712575521 has 8 divisors (see below), whose sum is σ = 82537148960. Its totient is φ = 37141716996.

The previous prime is 55712575511. The next prime is 55712575531. The reversal of 55712575521 is 12557521755.

55712575521 is a `hidden beast` number, since 5 + 5 + 71 + 2 + 57 + 5 + 521 = 666.

It is an interprime number because it is at equal distance from previous prime (55712575511) and next prime (55712575531).

It is a de Polignac number, because none of the positive numbers 2^k-55712575521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55712575511) 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 7 ways as a sum of consecutive naturals, for example, 1031714335 + ... + 1031714388.

It is an arithmetic number, because the mean of its divisors is an integer number (10317143620).

Almost surely, 2^55712575521 is an apocalyptic number.

It is an amenable number.

55712575521 is a deficient number, since it is larger than the sum of its proper divisors (26824573439).

55712575521 is a wasteful number, since it uses less digits than its factorization.

55712575521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2063428732 (or 2063428726 counting only the distinct ones).

The product of its digits is 612500, while the sum is 45.

The spelling of 55712575521 in words is "fifty-five billion, seven hundred twelve million, five hundred seventy-five thousand, five hundred twenty-one".