5545121255571 has 4 divisors (see below), whose sum is σ = 7393495007432. Its totient is φ = 3696747503712.

The previous prime is 5545121255543. The next prime is 5545121255579. The reversal of 5545121255571 is 1755521215455.

It is a happy number.

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

It is not a de Polignac number, because 5545121255571 - 2²⁶ = 5545054146707 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5545121255571.

It is not an unprimeable number, because it can be changed into a prime (5545121255579) 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, 924186875926 + ... + 924186875931.

It is an arithmetic number, because the mean of its divisors is an integer number (1848373751858).

Almost surely, 2^{5545121255571} is an apocalyptic number.

5545121255571 is a deficient number, since it is larger than the sum of its proper divisors (1848373751861).

5545121255571 is a wasteful number, since it uses less digits than its factorization.

5545121255571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1848373751860.

The product of its digits is 1750000, while the sum is 48.

The spelling of 5545121255571 in words is "five trillion, five hundred forty-five billion, one hundred twenty-one million, two hundred fifty-five thousand, five hundred seventy-one".