55780854 has 8 divisors (see below), whose sum is σ = 111561720. Its totient is φ = 18593616.

The previous prime is 55780853. The next prime is 55780861. The reversal of 55780854 is 45808755.

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

55780854 is an admirable number.

It is a super-2 number, since 2×55780854² = 6223007345938632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55780853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4648399 + ... + 4648410.

It is an arithmetic number, because the mean of its divisors is an integer number (13945215).

Almost surely, 2^55780854 is an apocalyptic number.

55780854 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55780854 is a wasteful number, since it uses less digits than its factorization.

55780854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9296814.

The product of its (nonzero) digits is 224000, while the sum is 42.

The square root of 55780854 is about 7468.6581124055. The cubic root of 55780854 is about 382.0865231675.

The spelling of 55780854 in words is "fifty-five million, seven hundred eighty thousand, eight hundred fifty-four".