55571649965 has 16 divisors (see below), whose sum is σ = 71820997248. Its totient is φ = 41034482496.

The previous prime is 55571649961. The next prime is 55571649971. The reversal of 55571649965 is 56994617555.

It is a cyclic number.

It is not a de Polignac number, because 55571649965 - 2² = 55571649961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55571649898 and 55571649907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55571649961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1242074 + ... + 1286036.

It is an arithmetic number, because the mean of its divisors is an integer number (4488812328).

Almost surely, 2^55571649965 is an apocalyptic number.

It is an amenable number.

55571649965 is a deficient number, since it is larger than the sum of its proper divisors (16249347283).

55571649965 is a wasteful number, since it uses less digits than its factorization.

55571649965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63428.

The product of its digits is 51030000, while the sum is 62.

The spelling of 55571649965 in words is "fifty-five billion, five hundred seventy-one million, six hundred forty-nine thousand, nine hundred sixty-five".