55778493 has 8 divisors (see below), whose sum is σ = 74409856. Its totient is φ = 37166400.

The previous prime is 55778467. The next prime is 55778521. The reversal of 55778493 is 39487755.

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

It is not a de Polignac number, because 55778493 - 2¹⁷ = 55647421 is a prime.

It is a super-2 number, since 2×55778493² = 6222480562702098, which contains 22 as substring.

It is the 7469-th Hogben number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55778413) by changing a digit.

It is a nontrivial repunit in base 7468.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4533 + ... + 11493.

It is an arithmetic number, because the mean of its divisors is an integer number (9301232).

Almost surely, 2^55778493 is an apocalyptic number.

It is an amenable number.

55778493 is a deficient number, since it is larger than the sum of its proper divisors (18631363).

55778493 is a wasteful number, since it uses less digits than its factorization.

55778493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9635.

The product of its digits is 1058400, while the sum is 48.

The square root of 55778493 is about 7468.5000502109. The cubic root of 55778493 is about 382.0811323154.

The spelling of 55778493 in words is "fifty-five million, seven hundred seventy-eight thousand, four hundred ninety-three".