55505055507 has 12 divisors (see below), whose sum is σ = 81346252680. Its totient is φ = 33639427360.

The previous prime is 55505055503. The next prime is 55505055533. The reversal of 55505055507 is 70555050555.

It is not a de Polignac number, because 55505055507 - 2² = 55505055503 is a prime.

It is a super-2 number, since 2×55505055507² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55505055503) 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, 76452882 + ... + 76453607.

It is an arithmetic number, because the mean of its divisors is an integer number (6778854390).

Almost surely, 2^55505055507 is an apocalyptic number.

55505055507 is a deficient number, since it is larger than the sum of its proper divisors (25841197173).

55505055507 is a wasteful number, since it uses less digits than its factorization.

55505055507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152906514 (or 152906503 counting only the distinct ones).

The product of its (nonzero) digits is 546875, while the sum is 42.

The spelling of 55505055507 in words is "fifty-five billion, five hundred five million, fifty-five thousand, five hundred seven".