550120122636540 has 96 divisors (see below), whose sum is σ = 1595350620864000. Its totient is φ = 141471302982912.

The previous prime is 550120122636529. The next prime is 550120122636541. The reversal of 550120122636540 is 45636221021055.

It is a junction number, because it is equal to n+sod(n) for n = 550120122636492 and 550120122636501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550120122636541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 186955510 + ... + 189875229.

It is an arithmetic number, because the mean of its divisors is an integer number (16618235634000).

Almost surely, 2^{550120122636540} is an apocalyptic number.

It is an amenable number.

550120122636540 is an abundant number, since it is smaller than the sum of its proper divisors (1045230498227460).

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

550120122636540 is a wasteful number, since it uses less digits than its factorization.

550120122636540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376831619 (or 376831617 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

Adding to 550120122636540 its reverse (45636221021055), we get a palindrome (595756343657595).

The spelling of 550120122636540 in words is "five hundred fifty trillion, one hundred twenty billion, one hundred twenty-two million, six hundred thirty-six thousand, five hundred forty".