549639819124 has 36 divisors (see below), whose sum is σ = 1057324526244. Its totient is φ = 249821440000.

The previous prime is 549639819121. The next prime is 549639819149. The reversal of 549639819124 is 421918936945.

It can be written as a sum of positive squares in 2 ways, for example, as 167985219600 + 381654599524 = 409860^2 + 617782^2 .

It is a super-2 number, since 2×549639819124² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549639819121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15596724 + ... + 15631924.

It is an arithmetic number, because the mean of its divisors is an integer number (29370125729).

Almost surely, 2^549639819124 is an apocalyptic number.

It is an amenable number.

549639819124 is a deficient number, since it is larger than the sum of its proper divisors (507684707120).

549639819124 is a wasteful number, since it uses less digits than its factorization.

549639819124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67488 (or 67475 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 61.

The spelling of 549639819124 in words is "five hundred forty-nine billion, six hundred thirty-nine million, eight hundred nineteen thousand, one hundred twenty-four".