55651563 has 16 divisors (see below), whose sum is σ = 89942400. Its totient is φ = 33728040.

The previous prime is 55651553. The next prime is 55651571. The reversal of 55651563 is 36515655.

55651563 is a `hidden beast` number, since 556 + 51 + 56 + 3 = 666.

It is not a de Polignac number, because 55651563 - 2⁶ = 55651499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55651553) 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, 93393 + ... + 93986.

It is an arithmetic number, because the mean of its divisors is an integer number (5621400).

Almost surely, 2^55651563 is an apocalyptic number.

55651563 is a deficient number, since it is larger than the sum of its proper divisors (34290837).

55651563 is a wasteful number, since it uses less digits than its factorization.

55651563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187399 (or 187393 counting only the distinct ones).

The product of its digits is 67500, while the sum is 36.

The square root of 55651563 is about 7459.9975201068. The cubic root of 55651563 is about 381.7910898681.

The spelling of 55651563 in words is "fifty-five million, six hundred fifty-one thousand, five hundred sixty-three".