42056550527721 has 4 divisors (see below), whose sum is σ = 56075400703632. Its totient is φ = 28037700351812.

The previous prime is 42056550527711. The next prime is 42056550527767. The reversal of 42056550527721 is 12772505565024.

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 42056550527721 - 2¹⁷ = 42056550396649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42056550527711) 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, 7009425087951 + ... + 7009425087956.

It is an arithmetic number, because the mean of its divisors is an integer number (14018850175908).

Almost surely, 2^{42056550527721} is an apocalyptic number.

It is an amenable number.

42056550527721 is a deficient number, since it is larger than the sum of its proper divisors (14018850175911).

42056550527721 is a wasteful number, since it uses less digits than its factorization.

42056550527721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14018850175910.

The product of its (nonzero) digits is 5880000, while the sum is 51.

The spelling of 42056550527721 in words is "forty-two trillion, fifty-six billion, five hundred fifty million, five hundred twenty-seven thousand, seven hundred twenty-one".