55220451544 has 32 divisors (see below), whose sum is σ = 106277729040. Its totient is φ = 26888688000.

The previous prime is 55220451499. The next prime is 55220451557. The reversal of 55220451544 is 44515402255.

It is a congruent number.

It is an unprimeable number.

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, 510894 + ... + 609469.

Almost surely, 2^55220451544 is an apocalyptic number.

It is an amenable number.

55220451544 is a deficient number, since it is larger than the sum of its proper divisors (51057277496).

55220451544 is a wasteful number, since it uses less digits than its factorization.

55220451544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120531 (or 1120527 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 37.

Adding to 55220451544 its reverse (44515402255), we get a palindrome (99735853799).

The spelling of 55220451544 in words is "fifty-five billion, two hundred twenty million, four hundred fifty-one thousand, five hundred forty-four".