161586640127 has 8 divisors (see below), whose sum is σ = 176299800912. Its totient is φ = 146877390400.

The previous prime is 161586640097. The next prime is 161586640151. The reversal of 161586640127 is 721046685161.

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 161586640127 - 2⁶ = 161586640063 is a prime.

It is a super-2 number, since 2×161586640127² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161586640157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 891038 + ... + 1056939.

It is an arithmetic number, because the mean of its divisors is an integer number (22037475114).

Almost surely, 2^161586640127 is an apocalyptic number.

161586640127 is a deficient number, since it is larger than the sum of its proper divisors (14713160785).

161586640127 is a wasteful number, since it uses less digits than its factorization.

161586640127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955529.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 161586640127 in words is "one hundred sixty-one billion, five hundred eighty-six million, six hundred forty thousand, one hundred twenty-seven".