42550526661 has 4 divisors (see below), whose sum is σ = 56734035552. Its totient is φ = 28367017772.

The previous prime is 42550526647. The next prime is 42550526663. The reversal of 42550526661 is 16662505524.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42550526661 - 2⁶ = 42550526597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42550526663) 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, 7091754441 + ... + 7091754446.

It is an arithmetic number, because the mean of its divisors is an integer number (14183508888).

Almost surely, 2^42550526661 is an apocalyptic number.

It is an amenable number.

42550526661 is a deficient number, since it is larger than the sum of its proper divisors (14183508891).

42550526661 is a wasteful number, since it uses less digits than its factorization.

42550526661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14183508890.

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 42550526661 in words is "forty-two billion, five hundred fifty million, five hundred twenty-six thousand, six hundred sixty-one".