55500551505 has 24 divisors (see below), whose sum is σ = 109943950272. Its totient is φ = 25371680544.

The previous prime is 55500551489. The next prime is 55500551507. The reversal of 55500551505 is 50515500555.

It is a happy number.

55500551505 is a `hidden beast` number, since 5 + 5 + 50 + 0 + 551 + 50 + 5 = 666.

55500551505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55500551505 - 2⁴ = 55500551489 is a prime.

It is a super-2 number, since 2×55500551505² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55500551505.

It is not an unprimeable number, because it can be changed into a prime (55500551507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88095799 + ... + 88096428.

It is an arithmetic number, because the mean of its divisors is an integer number (4580997928).

Almost surely, 2^55500551505 is an apocalyptic number.

It is an amenable number.

55500551505 is a deficient number, since it is larger than the sum of its proper divisors (54443398767).

55500551505 is a wasteful number, since it uses less digits than its factorization.

55500551505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176192245 (or 176192242 counting only the distinct ones).

The product of its (nonzero) digits is 78125, while the sum is 36.

The spelling of 55500551505 in words is "fifty-five billion, five hundred million, five hundred fifty-one thousand, five hundred five".