55136224840 has 16 divisors (see below), whose sum is σ = 124056505980. Its totient is φ = 22054489920.

The previous prime is 55136224817. The next prime is 55136224859. The reversal of 55136224840 is 4842263155.

It can be written as a sum of positive squares in 2 ways, for example, as 55077518596 + 58706244 = 234686^2 + 7662^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 1378405621 = 55136224840 / (5 + 5 + 1 + 3 + 6 + 2 + 2 + 4 + 8 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 55136224793 and 55136224802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689202771 + ... + 689202850.

Almost surely, 2^55136224840 is an apocalyptic number.

It is an amenable number.

55136224840 is an abundant number, since it is smaller than the sum of its proper divisors (68920281140).

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

55136224840 is a wasteful number, since it uses less digits than its factorization.

55136224840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378405632 (or 1378405628 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 40.

Adding to 55136224840 its reverse (4842263155), we get a palindrome (59978487995).

The spelling of 55136224840 in words is "fifty-five billion, one hundred thirty-six million, two hundred twenty-four thousand, eight hundred forty".