2161587967 has 32 divisors (see below), whose sum is σ = 2741299200. Its totient is φ = 1655596800.

The previous prime is 2161587943. The next prime is 2161587979. The reversal of 2161587967 is 7697851612.

It is not a de Polignac number, because 2161587967 - 2¹¹ = 2161585919 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 (2161587907) 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, 1635667 + ... + 1636987.

It is an arithmetic number, because the mean of its divisors is an integer number (85665600).

Almost surely, 2^2161587967 is an apocalyptic number.

2161587967 is a deficient number, since it is larger than the sum of its proper divisors (579711233).

2161587967 is a wasteful number, since it uses less digits than its factorization.

2161587967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1687.

The product of its digits is 1270080, while the sum is 52.

The square root of 2161587967 is about 46492.8808206160. The cubic root of 2161587967 is about 1292.9775115333.

The spelling of 2161587967 in words is "two billion, one hundred sixty-one million, five hundred eighty-seven thousand, nine hundred sixty-seven".