42088665629 has 4 divisors (see below), whose sum is σ = 42245129340. Its totient is φ = 41932201920.

The previous prime is 42088665617. The next prime is 42088665679. The reversal of 42088665629 is 92656688024.

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 8954836900 + 33133828729 = 94630^2 + 182027^2 .

It is a cyclic number.

It is not a de Polignac number, because 42088665629 - 2¹² = 42088661533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42088665679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78231452 + ... + 78231989.

It is an arithmetic number, because the mean of its divisors is an integer number (10561282335).

Almost surely, 2^42088665629 is an apocalyptic number.

It is an amenable number.

42088665629 is a deficient number, since it is larger than the sum of its proper divisors (156463711).

42088665629 is a wasteful number, since it uses less digits than its factorization.

42088665629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156463710.

The product of its (nonzero) digits is 9953280, while the sum is 56.

The spelling of 42088665629 in words is "forty-two billion, eighty-eight million, six hundred sixty-five thousand, six hundred twenty-nine".