42154542109 has 8 divisors (see below), whose sum is σ = 45804596480. Its totient is φ = 38647627200.

The previous prime is 42154542091. The next prime is 42154542139. The reversal of 42154542109 is 90124545124.

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

It is a cyclic number.

It is not a de Polignac number, because 42154542109 - 2⁷ = 42154541981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42154542139) 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, 35784252 + ... + 35785429.

It is an arithmetic number, because the mean of its divisors is an integer number (5725574560).

Almost surely, 2^42154542109 is an apocalyptic number.

It is an amenable number.

42154542109 is a deficient number, since it is larger than the sum of its proper divisors (3650054371).

42154542109 is a wasteful number, since it uses less digits than its factorization.

42154542109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71569731.

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 42154542109 in words is "forty-two billion, one hundred fifty-four million, five hundred forty-two thousand, one hundred nine".