542216003661 has 6 divisors (see below), whose sum is σ = 783200894190. Its totient is φ = 361477335768.

The previous prime is 542216003647. The next prime is 542216003737. The reversal of 542216003661 is 166300612245.

542216003661 is a `hidden beast` number, since 5 + 42 + 2 + 1 + 600 + 3 + 6 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 453966012900 + 88249990761 = 673770^2 + 297069^2 .

It is not a de Polignac number, because 542216003661 - 2⁶ = 542216003597 is a prime.

It is a super-2 number, since 2×542216003661² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542216003261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30123111306 + ... + 30123111323.

It is an arithmetic number, because the mean of its divisors is an integer number (130533482365).

Almost surely, 2^542216003661 is an apocalyptic number.

It is an amenable number.

542216003661 is a deficient number, since it is larger than the sum of its proper divisors (240984890529).

542216003661 is a wasteful number, since it uses less digits than its factorization.

542216003661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60246222635 (or 60246222632 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 542216003661 in words is "five hundred forty-two billion, two hundred sixteen million, three thousand, six hundred sixty-one".