55121436603 has 40 divisors (see below), whose sum is σ = 85609542480. Its totient is φ = 35316103680.

The previous prime is 55121436569. The next prime is 55121436607. The reversal of 55121436603 is 30663412155.

55121436603 is a `hidden beast` number, since 5 + 5 + 1 + 2 + 1 + 43 + 6 + 603 = 666.

It is not a de Polignac number, because 55121436603 - 2¹⁴ = 55121420219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55121436607) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 98643 + ... + 346371.

It is an arithmetic number, because the mean of its divisors is an integer number (2140238562).

Almost surely, 2^55121436603 is an apocalyptic number.

55121436603 is a deficient number, since it is larger than the sum of its proper divisors (30488105877).

55121436603 is a wasteful number, since it uses less digits than its factorization.

55121436603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247849 (or 247840 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

Adding to 55121436603 its reverse (30663412155), we get a palindrome (85784848758).

The spelling of 55121436603 in words is "fifty-five billion, one hundred twenty-one million, four hundred thirty-six thousand, six hundred three".