42754158721 has 4 divisors (see below), whose sum is σ = 45269109252. Its totient is φ = 40239208192.

The previous prime is 42754158677. The next prime is 42754158737. The reversal of 42754158721 is 12785145724.

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 24565860225 + 18188298496 = 156735^2 + 134864^2 .

It is a cyclic number.

It is not a de Polignac number, because 42754158721 - 2⁷ = 42754158593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42754158761) 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, 1257475240 + ... + 1257475273.

It is an arithmetic number, because the mean of its divisors is an integer number (11317277313).

Almost surely, 2^42754158721 is an apocalyptic number.

It is an amenable number.

42754158721 is a deficient number, since it is larger than the sum of its proper divisors (2514950531).

42754158721 is a wasteful number, since it uses less digits than its factorization.

42754158721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2514950530.

The product of its digits is 627200, while the sum is 46.

The spelling of 42754158721 in words is "forty-two billion, seven hundred fifty-four million, one hundred fifty-eight thousand, seven hundred twenty-one".