42145516345 has 4 divisors (see below), whose sum is σ = 50574619620. Its totient is φ = 33716413072.

The previous prime is 42145516337. The next prime is 42145516373. The reversal of 42145516345 is 54361554124.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27309545536 + 14835970809 = 165256^2 + 121803^2 .

It is a cyclic number.

It is not a de Polignac number, because 42145516345 - 2³ = 42145516337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42145516298 and 42145516307.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4214551630 + ... + 4214551639.

It is an arithmetic number, because the mean of its divisors is an integer number (12643654905).

Almost surely, 2^42145516345 is an apocalyptic number.

It is an amenable number.

42145516345 is a deficient number, since it is larger than the sum of its proper divisors (8429103275).

42145516345 is an equidigital number, since it uses as much as digits as its factorization.

42145516345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8429103274.

The product of its digits is 288000, while the sum is 40.

The spelling of 42145516345 in words is "forty-two billion, one hundred forty-five million, five hundred sixteen thousand, three hundred forty-five".