55421445512 has 32 divisors (see below), whose sum is σ = 107517677400. Its totient is φ = 26750406144.

The previous prime is 55421445491. The next prime is 55421445529. The reversal of 55421445512 is 21554412455.

It can be written as a sum of positive squares in 4 ways, for example, as 43183333636 + 12238111876 = 207806^2 + 110626^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1521788 + ... + 1557780.

Almost surely, 2^55421445512 is an apocalyptic number.

It is an amenable number.

55421445512 is a deficient number, since it is larger than the sum of its proper divisors (52096231888).

55421445512 is a wasteful number, since it uses less digits than its factorization.

55421445512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42665 (or 42661 counting only the distinct ones).

The product of its digits is 160000, while the sum is 38.

Adding to 55421445512 its reverse (21554412455), we get a palindrome (76975857967).

The spelling of 55421445512 in words is "fifty-five billion, four hundred twenty-one million, four hundred forty-five thousand, five hundred twelve".