55437775668 has 72 divisors (see below), whose sum is σ = 154387580256. Its totient is φ = 16632984000.

The previous prime is 55437775667. The next prime is 55437775681. The reversal of 55437775668 is 86657773455.

It is a happy number.

55437775668 is a `hidden beast` number, since 554 + 3 + 7 + 7 + 75 + 6 + 6 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55437775661) 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 23 ways as a sum of consecutive naturals, for example, 653046 + ... + 733037.

It is an arithmetic number, because the mean of its divisors is an integer number (2144271948).

Almost surely, 2^55437775668 is an apocalyptic number.

It is an amenable number.

55437775668 is an abundant number, since it is smaller than the sum of its proper divisors (98949804588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55437775668 is a wasteful number, since it uses less digits than its factorization.

55437775668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386205 (or 1386200 counting only the distinct ones).

The product of its digits is 148176000, while the sum is 63.

The spelling of 55437775668 in words is "fifty-five billion, four hundred thirty-seven million, seven hundred seventy-five thousand, six hundred sixty-eight".