55415044251121 has 4 divisors (see below), whose sum is σ = 55484573793012. Its totient is φ = 55345514709232.

The previous prime is 55415044251079. The next prime is 55415044251157. The reversal of 55415044251121 is 12115244051455.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15547753708096 + 39867290543025 = 3943064^2 + 6314055^2 .

It is a cyclic number.

It is not a de Polignac number, because 55415044251121 - 2¹⁵ = 55415044218353 is a prime.

It is a super-3 number, since 3×55415044251121³ (a number of 42 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55415044251181) 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, 34764769750 + ... + 34764771343.

It is an arithmetic number, because the mean of its divisors is an integer number (13871143448253).

Almost surely, 2^{55415044251121} is an apocalyptic number.

It is an amenable number.

55415044251121 is a deficient number, since it is larger than the sum of its proper divisors (69529541891).

55415044251121 is an equidigital number, since it uses as much as digits as its factorization.

55415044251121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69529541890.

The product of its (nonzero) digits is 160000, while the sum is 40.

The spelling of 55415044251121 in words is "fifty-five trillion, four hundred fifteen billion, forty-four million, two hundred fifty-one thousand, one hundred twenty-one".