42154145546 has 4 divisors (see below), whose sum is σ = 63231218322. Its totient is φ = 21077072772.

The previous prime is 42154145543. The next prime is 42154145563. The reversal of 42154145546 is 64554145124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 39744808321 + 2409337225 = 199361^2 + 49085^2 .

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 as a sum of consecutive naturals, namely, 10538536385 + ... + 10538536388.

Almost surely, 2^42154145546 is an apocalyptic number.

42154145546 is a deficient number, since it is larger than the sum of its proper divisors (21077072776).

42154145546 is a wasteful number, since it uses less digits than its factorization.

42154145546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21077072775.

The product of its digits is 384000, while the sum is 41.

The spelling of 42154145546 in words is "forty-two billion, one hundred fifty-four million, one hundred forty-five thousand, five hundred forty-six".