551661556552 has 16 divisors (see below), whose sum is σ = 1048534808940. Its totient is φ = 272052274176.

The previous prime is 551661556529. The next prime is 551661556571. The reversal of 551661556552 is 255655166155.

It can be written as a sum of positive squares in 2 ways, for example, as 551653794756 + 7761796 = 742734^2 + 2786^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 551661556552.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 472312393 + ... + 472313560.

Almost surely, 2^551661556552 is an apocalyptic number.

It is an amenable number.

551661556552 is a deficient number, since it is larger than the sum of its proper divisors (496873252388).

551661556552 is a wasteful number, since it uses less digits than its factorization.

551661556552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944626032 (or 944626028 counting only the distinct ones).

The product of its digits is 6750000, while the sum is 52.

The spelling of 551661556552 in words is "five hundred fifty-one billion, six hundred sixty-one million, five hundred fifty-six thousand, five hundred fifty-two".