55115656520 has 32 divisors (see below), whose sum is σ = 128286444600. Its totient is φ = 21286046208.

The previous prime is 55115656517. The next prime is 55115656529. The reversal of 55115656520 is 2565651155.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 52081629796 + 3034026724 = 228214^2 + 55082^2 .

It is not an unprimeable number, because it can be changed into a prime (55115656529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23755589 + ... + 23757908.

Almost surely, 2^55115656520 is an apocalyptic number.

It is an amenable number.

55115656520 is an abundant number, since it is smaller than the sum of its proper divisors (73170788080).

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

55115656520 is a wasteful number, since it uses less digits than its factorization.

55115656520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47513537 (or 47513533 counting only the distinct ones).

The product of its (nonzero) digits is 225000, while the sum is 41.

The spelling of 55115656520 in words is "fifty-five billion, one hundred fifteen million, six hundred fifty-six thousand, five hundred twenty".