55120534205 has 48 divisors (see below), whose sum is σ = 77847421680. Its totient is φ = 37305016320.

The previous prime is 55120534129. The next prime is 55120534207. The reversal of 55120534205 is 50243502155.

It can be written as a sum of positive squares in 8 ways, for example, as 11190889369 + 43929644836 = 105787^2 + 209594^2 .

It is not a de Polignac number, because 55120534205 - 2¹⁸ = 55120272061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55120534207) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 885257 + ... + 945473.

It is an arithmetic number, because the mean of its divisors is an integer number (1621821285).

Almost surely, 2^55120534205 is an apocalyptic number.

55120534205 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55120534205 is a deficient number, since it is larger than the sum of its proper divisors (22726887475).

55120534205 is a wasteful number, since it uses less digits than its factorization.

55120534205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60350 (or 60339 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 32.

The spelling of 55120534205 in words is "fifty-five billion, one hundred twenty million, five hundred thirty-four thousand, two hundred five".