55461591 has 14 divisors (see below), whose sum is σ = 83155440. Its totient is φ = 36973908.

The previous prime is 55461587. The next prime is 55461611. The reversal of 55461591 is 19516455.

55461591 is a `hidden beast` number, since 5 + 5 + 4 + 61 + 591 = 666.

It is not a de Polignac number, because 55461591 - 2² = 55461587 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55461391) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 37311 + ... + 38768.

Almost surely, 2^55461591 is an apocalyptic number.

55461591 is a deficient number, since it is larger than the sum of its proper divisors (27693849).

55461591 is an frugal number, since it uses more digits than its factorization.

55461591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76097 (or 76082 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The square root of 55461591 is about 7447.2539234271. The cubic root of 55461591 is about 381.3561676554.

The spelling of 55461591 in words is "fifty-five million, four hundred sixty-one thousand, five hundred ninety-one".