42735272721 has 8 divisors (see below), whose sum is σ = 56998858080. Its totient is φ = 28480934592.

The previous prime is 42735272603. The next prime is 42735272771. The reversal of 42735272721 is 12727253724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42735272721 - 2¹⁷ = 42735141649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42735272771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2301016 + ... + 2319513.

It is an arithmetic number, because the mean of its divisors is an integer number (7124857260).

Almost surely, 2^42735272721 is an apocalyptic number.

It is an amenable number.

42735272721 is a deficient number, since it is larger than the sum of its proper divisors (14263585359).

42735272721 is a wasteful number, since it uses less digits than its factorization.

42735272721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4623615.

The product of its digits is 329280, while the sum is 42.

The spelling of 42735272721 in words is "forty-two billion, seven hundred thirty-five million, two hundred seventy-two thousand, seven hundred twenty-one".