12001631587 has 32 divisors (see below), whose sum is σ = 14015462400. Its totient is φ = 10168878720.

The previous prime is 12001631581. The next prime is 12001631611. The reversal of 12001631587 is 78513610021.

It is a happy number.

It is not a de Polignac number, because 12001631587 - 2¹¹ = 12001629539 is a prime.

It is a super-2 number, since 2×12001631587² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12001631581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1994938 + ... + 2000944.

It is an arithmetic number, because the mean of its divisors is an integer number (437983200).

Almost surely, 2^12001631587 is an apocalyptic number.

12001631587 is a deficient number, since it is larger than the sum of its proper divisors (2013830813).

12001631587 is a wasteful number, since it uses less digits than its factorization.

12001631587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6243.

The product of its (nonzero) digits is 10080, while the sum is 34.

The spelling of 12001631587 in words is "twelve billion, one million, six hundred thirty-one thousand, five hundred eighty-seven".