55801865 has 8 divisors (see below), whose sum is σ = 76528320. Its totient is φ = 38264112.

The previous prime is 55801859. The next prime is 55801877. The reversal of 55801865 is 56810855.

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

It is a cyclic number.

It is not a de Polignac number, because 55801865 - 2⁴ = 55801849 is a prime.

It is a super-2 number, since 2×55801865² = 6227696274956450, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 797135 + ... + 797204.

It is an arithmetic number, because the mean of its divisors is an integer number (9566040).

Almost surely, 2^55801865 is an apocalyptic number.

It is an amenable number.

55801865 is a deficient number, since it is larger than the sum of its proper divisors (20726455).

55801865 is a wasteful number, since it uses less digits than its factorization.

55801865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594351.

The product of its (nonzero) digits is 48000, while the sum is 38.

The square root of 55801865 is about 7470.0645914209. The cubic root of 55801865 is about 382.1344907144.

The spelling of 55801865 in words is "fifty-five million, eight hundred one thousand, eight hundred sixty-five".