55605389 has 16 divisors (see below), whose sum is σ = 65412480. Its totient is φ = 46275840.

The previous prime is 55605373. The next prime is 55605397. The reversal of 55605389 is 98350655.

It is a cyclic number.

It is not a de Polignac number, because 55605389 - 2⁴ = 55605373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55605349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89522 + ... + 90140.

It is an arithmetic number, because the mean of its divisors is an integer number (4088280).

Almost surely, 2^55605389 is an apocalyptic number.

It is an amenable number.

55605389 is a deficient number, since it is larger than the sum of its proper divisors (9807091).

55605389 is a wasteful number, since it uses less digits than its factorization.

55605389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 55605389 is about 7456.9021047617. The cubic root of 55605389 is about 381.6854701956.

The spelling of 55605389 in words is "fifty-five million, six hundred five thousand, three hundred eighty-nine".