55285646641 has 9 divisors (see below), whose sum is σ = 57799534009. Its totient is φ = 52876750036.

The previous prime is 55285646639. The next prime is 55285646651. The reversal of 55285646641 is 14664658255.

The square root of 55285646641 is 235129.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 55285646641 - 2¹ = 55285646639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55285646651) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5402856 + ... + 5413078.

Almost surely, 2^55285646641 is an apocalyptic number.

55285646641 is the 235129-th square number.

55285646641 is the 117565-th centered octagonal number.

It is an amenable number.

55285646641 is a deficient number, since it is larger than the sum of its proper divisors (2513887368).

55285646641 is an frugal number, since it uses more digits than its factorization.

55285646641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20492 (or 10246 counting only the distinct ones).

The product of its digits is 6912000, while the sum is 52.

The spelling of 55285646641 in words is "fifty-five billion, two hundred eighty-five million, six hundred forty-six thousand, six hundred forty-one".