55447239771 has 48 divisors (see below), whose sum is σ = 103189273600. Its totient is φ = 28803749040.

The previous prime is 55447239767. The next prime is 55447239779. The reversal of 55447239771 is 17793274455.

55447239771 is a `hidden beast` number, since 5 + 544 + 7 + 2 + 3 + 97 + 7 + 1 = 666.

It is not a de Polignac number, because 55447239771 - 2² = 55447239767 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55447239779) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1189411 + ... + 1235148.

Almost surely, 2^55447239771 is an apocalyptic number.

55447239771 is a deficient number, since it is larger than the sum of its proper divisors (47742033829).

55447239771 is a wasteful number, since it uses less digits than its factorization.

55447239771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2424597 (or 2424580 counting only the distinct ones).

The product of its digits is 7408800, while the sum is 54.

The spelling of 55447239771 in words is "fifty-five billion, four hundred forty-seven million, two hundred thirty-nine thousand, seven hundred seventy-one".