55405958 has 8 divisors (see below), whose sum is σ = 87997752. Its totient is φ = 26073376.

The previous prime is 55405949. The next prime is 55405963. The reversal of 55405958 is 85950455.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 814760 + ... + 814827.

It is an arithmetic number, because the mean of its divisors is an integer number (10999719).

Almost surely, 2^55405958 is an apocalyptic number.

55405958 is a deficient number, since it is larger than the sum of its proper divisors (32591794).

55405958 is a wasteful number, since it uses less digits than its factorization.

55405958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629606.

The product of its (nonzero) digits is 180000, while the sum is 41.

The square root of 55405958 is about 7443.5178511239. The cubic root of 55405958 is about 381.2286134021.

The spelling of 55405958 in words is "fifty-five million, four hundred five thousand, nine hundred fifty-eight".