55503649 has 4 divisors (see below), whose sum is σ = 55526980. Its totient is φ = 55480320.

The previous prime is 55503647. The next prime is 55503659. The reversal of 55503649 is 94630555.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4809249 + 50694400 = 2193^2 + 7120^2 .

It is a cyclic number.

It is not a de Polignac number, because 55503649 - 2¹ = 55503647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55503647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7632 + ... + 13009.

It is an arithmetic number, because the mean of its divisors is an integer number (13881745).

Almost surely, 2^55503649 is an apocalyptic number.

It is an amenable number.

55503649 is a deficient number, since it is larger than the sum of its proper divisors (23331).

55503649 is a wasteful number, since it uses less digits than its factorization.

55503649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23330.

The product of its (nonzero) digits is 81000, while the sum is 37.

The square root of 55503649 is about 7450.0771136949. The cubic root of 55503649 is about 381.4525408081.

The spelling of 55503649 in words is "fifty-five million, five hundred three thousand, six hundred forty-nine".