42811252565 has 8 divisors (see below), whose sum is σ = 51844820280. Its totient is φ = 33934790592.

The previous prime is 42811252559. The next prime is 42811252567. The reversal of 42811252565 is 56525211824.

It can be written as a sum of positive squares in 4 ways, for example, as 18795861604 + 24015390961 = 137098^2 + 154969^2 .

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 42811252565 - 2³⁴ = 25631383381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42811252567) 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, 39275834 + ... + 39276923.

It is an arithmetic number, because the mean of its divisors is an integer number (6480602535).

Almost surely, 2^42811252565 is an apocalyptic number.

It is an amenable number.

42811252565 is a deficient number, since it is larger than the sum of its proper divisors (9033567715).

42811252565 is a wasteful number, since it uses less digits than its factorization.

42811252565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78552871.

The product of its digits is 192000, while the sum is 41.

The spelling of 42811252565 in words is "forty-two billion, eight hundred eleven million, two hundred fifty-two thousand, five hundred sixty-five".