55408647 has 32 divisors (see below), whose sum is σ = 89740800. Its totient is φ = 29731968.

The previous prime is 55408643. The next prime is 55408667. The reversal of 55408647 is 74680455.

55408647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55408647 - 2² = 55408643 is a prime.

It is a super-3 number, since 3×55408647³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55408643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21304 + ... + 23762.

It is an arithmetic number, because the mean of its divisors is an integer number (2804400).

Almost surely, 2^55408647 is an apocalyptic number.

55408647 is a deficient number, since it is larger than the sum of its proper divisors (34332153).

55408647 is a wasteful number, since it uses less digits than its factorization.

55408647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2535.

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 55408647 is about 7443.6984758922. The cubic root of 55408647 is about 381.2347806520.

The spelling of 55408647 in words is "fifty-five million, four hundred eight thousand, six hundred forty-seven".