42740648121 has 16 divisors (see below), whose sum is σ = 57072423744. Its totient is φ = 28451353344.

The previous prime is 42740648101. The next prime is 42740648129. The reversal of 42740648121 is 12184604724.

42740648121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42740648121 - 2⁷ = 42740647993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42740648121.

It is not an unprimeable number, because it can be changed into a prime (42740648129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8926090 + ... + 8930876.

It is an arithmetic number, because the mean of its divisors is an integer number (3567026484).

Almost surely, 2^42740648121 is an apocalyptic number.

It is an amenable number.

42740648121 is a deficient number, since it is larger than the sum of its proper divisors (14331775623).

42740648121 is a wasteful number, since it uses less digits than its factorization.

42740648121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8600.

The product of its (nonzero) digits is 86016, while the sum is 39.

The spelling of 42740648121 in words is "forty-two billion, seven hundred forty million, six hundred forty-eight thousand, one hundred twenty-one".