55458681 has 8 divisors (see below), whose sum is σ = 77160000. Its totient is φ = 35364912.

The previous prime is 55458677. The next prime is 55458707. The reversal of 55458681 is 18685455.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55458681 - 2² = 55458677 is a prime.

It is a super-2 number, since 2×55458681² = 6151330596519522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55454681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401806 + ... + 401943.

It is an arithmetic number, because the mean of its divisors is an integer number (9645000).

Almost surely, 2^55458681 is an apocalyptic number.

It is an amenable number.

55458681 is a deficient number, since it is larger than the sum of its proper divisors (21701319).

55458681 is a wasteful number, since it uses less digits than its factorization.

55458681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803775.

The product of its digits is 192000, while the sum is 42.

The square root of 55458681 is about 7447.0585468358. The cubic root of 55458681 is about 381.3494977791.

The spelling of 55458681 in words is "fifty-five million, four hundred fifty-eight thousand, six hundred eighty-one".