55170521011 has 4 divisors (see below), whose sum is σ = 57072952800. Its totient is φ = 53268089224.

The previous prime is 55170520991. The next prime is 55170521017. The reversal of 55170521011 is 11012507155.

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 55170521011 - 2⁹ = 55170520499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55170521017) 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, 951215851 + ... + 951215908.

It is an arithmetic number, because the mean of its divisors is an integer number (14268238200).

Almost surely, 2^55170521011 is an apocalyptic number.

55170521011 is a deficient number, since it is larger than the sum of its proper divisors (1902431789).

55170521011 is a wasteful number, since it uses less digits than its factorization.

55170521011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1902431788.

The product of its (nonzero) digits is 1750, while the sum is 28.

The spelling of 55170521011 in words is "fifty-five billion, one hundred seventy million, five hundred twenty-one thousand, eleven".