55645397446 has 16 divisors (see below), whose sum is σ = 83630986560. Its totient is φ = 27768433320.

The previous prime is 55645397419. The next prime is 55645397447. The reversal of 55645397446 is 64479354655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55645397447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5059165 + ... + 5070151.

It is an arithmetic number, because the mean of its divisors is an integer number (5226936660).

Almost surely, 2^55645397446 is an apocalyptic number.

55645397446 is a deficient number, since it is larger than the sum of its proper divisors (27985589114).

55645397446 is a wasteful number, since it uses less digits than its factorization.

55645397446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15699.

The product of its digits is 54432000, while the sum is 58.

The spelling of 55645397446 in words is "fifty-five billion, six hundred forty-five million, three hundred ninety-seven thousand, four hundred forty-six".