5542231661 has 4 divisors (see below), whose sum is σ = 5546047452. Its totient is φ = 5538415872.

The previous prime is 5542231637. The next prime is 5542231697. The reversal of 5542231661 is 1661322455.

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 4941246436 + 600985225 = 70294^2 + 24515^2 .

It is a cyclic number.

It is not a de Polignac number, because 5542231661 - 2²⁶ = 5475122797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5542231631) 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, 1905716 + ... + 1908621.

It is an arithmetic number, because the mean of its divisors is an integer number (1386511863).

Almost surely, 2^5542231661 is an apocalyptic number.

It is an amenable number.

5542231661 is a deficient number, since it is larger than the sum of its proper divisors (3815791).

5542231661 is a wasteful number, since it uses less digits than its factorization.

5542231661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3815790.

The product of its digits is 43200, while the sum is 35.

The square root of 5542231661 is about 74446.1661941030. The cubic root of 5542231661 is about 1769.6806068232.

The spelling of 5542231661 in words is "five billion, five hundred forty-two million, two hundred thirty-one thousand, six hundred sixty-one".