55629561 has 24 divisors (see below), whose sum is σ = 81111456. Its totient is φ = 33895680.

The previous prime is 55629557. The next prime is 55629589. The reversal of 55629561 is 16592655.

It is not a de Polignac number, because 55629561 - 2² = 55629557 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (55629521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56806 + ... + 57776.

It is an arithmetic number, because the mean of its divisors is an integer number (3379644).

Almost surely, 2^55629561 is an apocalyptic number.

It is an amenable number.

55629561 is a deficient number, since it is larger than the sum of its proper divisors (25481895).

55629561 is a wasteful number, since it uses less digits than its factorization.

55629561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113 (or 1100 counting only the distinct ones).

The product of its digits is 81000, while the sum is 39.

The square root of 55629561 is about 7458.5227089552. The cubic root of 55629561 is about 381.7407691801.

The spelling of 55629561 in words is "fifty-five million, six hundred twenty-nine thousand, five hundred sixty-one".