42636068991 has 12 divisors (see below), whose sum is σ = 62220335632. Its totient is φ = 28131014016.

The previous prime is 42636068987. The next prime is 42636069019. The reversal of 42636068991 is 19986063624.

42636068991 is a `hidden beast` number, since 4 + 26 + 3 + 606 + 8 + 9 + 9 + 1 = 666.

It is not a de Polignac number, because 42636068991 - 2² = 42636068987 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 (42636068591) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24418411 + ... + 24420156.

Almost surely, 2^42636068991 is an apocalyptic number.

42636068991 is a deficient number, since it is larger than the sum of its proper divisors (19584266641).

42636068991 is a wasteful number, since it uses less digits than its factorization.

42636068991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48838670 (or 48838667 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 54.

The spelling of 42636068991 in words is "forty-two billion, six hundred thirty-six million, sixty-eight thousand, nine hundred ninety-one".