55212358668 has 48 divisors (see below), whose sum is σ = 140807245824. Its totient is φ = 16762763520.

The previous prime is 55212358661. The next prime is 55212358681. The reversal of 55212358668 is 86685321255.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 55212358668.

It is not an unprimeable number, because it can be changed into a prime (55212358661) 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 15 ways as a sum of consecutive naturals, for example, 4358980 + ... + 4371627.

It is an arithmetic number, because the mean of its divisors is an integer number (2933484288).

Almost surely, 2^55212358668 is an apocalyptic number.

It is an amenable number.

55212358668 is an abundant number, since it is smaller than the sum of its proper divisors (85594887156).

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

55212358668 is a wasteful number, since it uses less digits than its factorization.

55212358668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8730662 (or 8730660 counting only the distinct ones).

The product of its digits is 3456000, while the sum is 51.

The spelling of 55212358668 in words is "fifty-five billion, two hundred twelve million, three hundred fifty-eight thousand, six hundred sixty-eight".