551661556524 has 24 divisors (see below), whose sum is σ = 1386226475760. Its totient is φ = 169742017344.

The previous prime is 551661556519. The next prime is 551661556529. The reversal of 551661556524 is 425655166155.

It is an interprime number because it is at equal distance from previous prime (551661556519) and next prime (551661556529).

It is not an unprimeable number, because it can be changed into a prime (551661556529) 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, 1768145859 + ... + 1768146170.

It is an arithmetic number, because the mean of its divisors is an integer number (57759436490).

Almost surely, 2^551661556524 is an apocalyptic number.

It is an amenable number.

551661556524 is an abundant number, since it is smaller than the sum of its proper divisors (834564919236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551661556524 is a wasteful number, since it uses less digits than its factorization.

551661556524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3536292049 (or 3536292047 counting only the distinct ones).

The product of its digits is 5400000, while the sum is 51.

The spelling of 551661556524 in words is "five hundred fifty-one billion, six hundred sixty-one million, five hundred fifty-six thousand, five hundred twenty-four".