55624061661 has 16 divisors (see below), whose sum is σ = 84824681088. Its totient is φ = 31761100800.

The previous prime is 55624061657. The next prime is 55624061663. The reversal of 55624061661 is 16616042655.

It is not a de Polignac number, because 55624061661 - 2² = 55624061657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55624061663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 974820 + ... + 1030301.

It is an arithmetic number, because the mean of its divisors is an integer number (5301542568).

Almost surely, 2^55624061661 is an apocalyptic number.

It is an amenable number.

55624061661 is a deficient number, since it is larger than the sum of its proper divisors (29200619427).

55624061661 is a wasteful number, since it uses less digits than its factorization.

55624061661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006452.

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 55624061661 in words is "fifty-five billion, six hundred twenty-four million, sixty-one thousand, six hundred sixty-one".