55591416 has 48 divisors (see below), whose sum is σ = 158488200. Its totient is φ = 17554752.

The previous prime is 55591409. The next prime is 55591423. The reversal of 55591416 is 61419555.

55591416 is a `hidden beast` number, since 55 + 591 + 4 + 16 = 666.

It is an interprime number because it is at equal distance from previous prime (55591409) and next prime (55591423).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18951 + ... + 21686.

Almost surely, 2^55591416 is an apocalyptic number.

It is an amenable number.

55591416 is an abundant number, since it is smaller than the sum of its proper divisors (102896784).

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

55591416 is a wasteful number, since it uses less digits than its factorization.

55591416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40668 (or 40661 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The square root of 55591416 is about 7455.9651286738. The cubic root of 55591416 is about 381.6534964489.

The spelling of 55591416 in words is "fifty-five million, five hundred ninety-one thousand, four hundred sixteen".