55550555507 has 4 divisors (see below), whose sum is σ = 55565568816. Its totient is φ = 55535542200.

The previous prime is 55550555503. The next prime is 55550555551. The reversal of 55550555507 is 70555505555.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55550555507 - 2² = 55550555503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55550555503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7501103 + ... + 7508504.

It is an arithmetic number, because the mean of its divisors is an integer number (13891392204).

Almost surely, 2^55550555507 is an apocalyptic number.

55550555507 is a deficient number, since it is larger than the sum of its proper divisors (15013309).

55550555507 is a wasteful number, since it uses less digits than its factorization.

55550555507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15013308.

The product of its (nonzero) digits is 2734375, while the sum is 47.

The spelling of 55550555507 in words is "fifty-five billion, five hundred fifty million, five hundred fifty-five thousand, five hundred seven".