542124434161 has 4 divisors (see below), whose sum is σ = 544139766900. Its totient is φ = 540109101424.

The previous prime is 542124434141. The next prime is 542124434213. The reversal of 542124434161 is 161434421245.

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 292863886561 + 249260547600 = 541169^2 + 499260^2 .

It is a cyclic number.

It is not a de Polignac number, because 542124434161 - 2³⁵ = 507764695793 is a prime.

It is a super-2 number, since 2×542124434161² (a number of 24 digits) contains 22 as substring.

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 542124434161.

It is not an unprimeable number, because it can be changed into a prime (542124434141) 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, 1007665966 + ... + 1007666503.

It is an arithmetic number, because the mean of its divisors is an integer number (136034941725).

Almost surely, 2^542124434161 is an apocalyptic number.

It is an amenable number.

542124434161 is a deficient number, since it is larger than the sum of its proper divisors (2015332739).

542124434161 is a wasteful number, since it uses less digits than its factorization.

542124434161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2015332738.

The product of its digits is 92160, while the sum is 37.

The spelling of 542124434161 in words is "five hundred forty-two billion, one hundred twenty-four million, four hundred thirty-four thousand, one hundred sixty-one".