55620606181 has 4 divisors (see below), whose sum is σ = 63566407072. Its totient is φ = 47674805292.

The previous prime is 55620606179. The next prime is 55620606203. The reversal of 55620606181 is 18160602655.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55620606181 - 2¹ = 55620606179 is a prime.

It is a super-2 number, since 2×55620606181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55620606101) 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, 3972900435 + ... + 3972900448.

It is an arithmetic number, because the mean of its divisors is an integer number (15891601768).

Almost surely, 2^55620606181 is an apocalyptic number.

It is an amenable number.

55620606181 is a deficient number, since it is larger than the sum of its proper divisors (7945800891).

55620606181 is an equidigital number, since it uses as much as digits as its factorization.

55620606181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7945800890.

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 55620606181 in words is "fifty-five billion, six hundred twenty million, six hundred six thousand, one hundred eighty-one".