55443943552761 has 135 divisors (see below), whose sum is σ = 87786661149759. Its totient is φ = 34871192066592.

The previous prime is 55443943552759. The next prime is 55443943552783. The reversal of 55443943552761 is 16725534934455.

The square root of 55443943552761 is 7446069.

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

55443943552761 is a `hidden beast` number, since 5 + 5 + 4 + 4 + 3 + 9 + 4 + 3 + 552 + 76 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 29073459104361 + 26370484448400 = 5391981^2 + 5135220^2 .

It is not a de Polignac number, because 55443943552761 - 2¹ = 55443943552759 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55443943552861) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 91340928120 + ... + 91340928726.

Almost surely, 2^{55443943552761} is an apocalyptic number.

55443943552761 is the 7446069-th square number.

55443943552761 is the 3723035-th centered octagonal number.

It is an amenable number.

55443943552761 is a deficient number, since it is larger than the sum of its proper divisors (32342717596998).

55443943552761 is an frugal number, since it uses more digits than its factorization.

55443943552761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378 (or 686 counting only the distinct ones).

The product of its digits is 272160000, while the sum is 63.

The spelling of 55443943552761 in words is "fifty-five trillion, four hundred forty-three billion, nine hundred forty-three million, five hundred fifty-two thousand, seven hundred sixty-one".