55686493 has 8 divisors (see below), whose sum is σ = 57024000. Its totient is φ = 54355440.

The previous prime is 55686457. The next prime is 55686523. The reversal of 55686493 is 39468655.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55686493 is a prime.

It is a super-4 number, since 4×55686493⁴ (a number of 32 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55686403) 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, 18883 + ... + 21631.

It is an arithmetic number, because the mean of its divisors is an integer number (7128000).

Almost surely, 2^55686493 is an apocalyptic number.

It is an amenable number.

55686493 is a deficient number, since it is larger than the sum of its proper divisors (1337507).

55686493 is a wasteful number, since it uses less digits than its factorization.

55686493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3227.

The product of its digits is 777600, while the sum is 46.

The square root of 55686493 is about 7462.3383064560. The cubic root of 55686493 is about 381.8709508992.

The spelling of 55686493 in words is "fifty-five million, six hundred eighty-six thousand, four hundred ninety-three".