42015041561 has 8 divisors (see below), whose sum is σ = 44533212264. Its totient is φ = 39502059520.

The previous prime is 42015041539. The next prime is 42015041569. The reversal of 42015041561 is 16514051024.

It can be written as a sum of positive squares in 4 ways, for example, as 14603272336 + 27411769225 = 120844^2 + 165565^2 .

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

It is not a de Polignac number, because 42015041561 - 2³⁴ = 24835172377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42015041569) 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, 1280480 + ... + 1312881.

It is an arithmetic number, because the mean of its divisors is an integer number (5566651533).

Almost surely, 2^42015041561 is an apocalyptic number.

It is an amenable number.

42015041561 is a deficient number, since it is larger than the sum of its proper divisors (2518170703).

42015041561 is a wasteful number, since it uses less digits than its factorization.

42015041561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2594331.

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 42015041561 its reverse (16514051024), we get a palindrome (58529092585).

The spelling of 42015041561 in words is "forty-two billion, fifteen million, forty-one thousand, five hundred sixty-one".