55649697 has 16 divisors (see below), whose sum is σ = 76156608. Its totient is φ = 36126720.

The previous prime is 55649683. The next prime is 55649723. The reversal of 55649697 is 79694655.

It is not a de Polignac number, because 55649697 - 2⁸ = 55649441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55649677) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 82353 + ... + 83025.

It is an arithmetic number, because the mean of its divisors is an integer number (4759788).

Almost surely, 2^55649697 is an apocalyptic number.

It is an amenable number.

55649697 is a deficient number, since it is larger than the sum of its proper divisors (20506911).

55649697 is a wasteful number, since it uses less digits than its factorization.

55649697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360.

The product of its digits is 2041200, while the sum is 51.

The square root of 55649697 is about 7459.8724519927. The cubic root of 55649697 is about 381.7868226616.

The spelling of 55649697 in words is "fifty-five million, six hundred forty-nine thousand, six hundred ninety-seven".