55621101320 has 16 divisors (see below), whose sum is σ = 125147478060. Its totient is φ = 22248440512.

The previous prime is 55621101299. The next prime is 55621101337. The reversal of 55621101320 is 2310112655.

It can be written as a sum of positive squares in 2 ways, for example, as 46485947236 + 9135154084 = 215606^2 + 95578^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55621101320.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 695263727 + ... + 695263806.

Almost surely, 2^55621101320 is an apocalyptic number.

It is an amenable number.

55621101320 is an abundant number, since it is smaller than the sum of its proper divisors (69526376740).

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

55621101320 is a wasteful number, since it uses less digits than its factorization.

55621101320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390527544 (or 1390527540 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 55621101320 its reverse (2310112655), we get a palindrome (57931213975).

The spelling of 55621101320 in words is "fifty-five billion, six hundred twenty-one million, one hundred one thousand, three hundred twenty".