42154145545 has 8 divisors (see below), whose sum is σ = 50589151560. Its totient is φ = 33720531840.

The previous prime is 42154145543. The next prime is 42154145563. The reversal of 42154145545 is 54554145124.

It can be written as a sum of positive squares in 4 ways, for example, as 99620361 + 42054525184 = 9981^2 + 205072^2 .

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

It is not a de Polignac number, because 42154145545 - 2¹ = 42154145543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42154145498 and 42154145507.

It is not an unprimeable number, because it can be changed into a prime (42154145543) 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, 280266 + ... + 403555.

It is an arithmetic number, because the mean of its divisors is an integer number (6323643945).

Almost surely, 2^42154145545 is an apocalyptic number.

It is an amenable number.

42154145545 is a deficient number, since it is larger than the sum of its proper divisors (8435006015).

42154145545 is a wasteful number, since it uses less digits than its factorization.

42154145545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696155.

The product of its digits is 320000, while the sum is 40.

The spelling of 42154145545 in words is "forty-two billion, one hundred fifty-four million, one hundred forty-five thousand, five hundred forty-five".