161130172087 has 12 divisors (see below), whose sum is σ = 170083557216. Its totient is φ = 152625844800.

The previous prime is 161130172079. The next prime is 161130172103. The reversal of 161130172087 is 780271031161.

161130172087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161130172087 - 2³ = 161130172079 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 (161130172037) 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 11 ways as a sum of consecutive naturals, for example, 2550303 + ... + 2612719.

It is an arithmetic number, because the mean of its divisors is an integer number (14173629768).

Almost surely, 2^161130172087 is an apocalyptic number.

161130172087 is a deficient number, since it is larger than the sum of its proper divisors (8953385129).

161130172087 is an equidigital number, since it uses as much as digits as its factorization.

161130172087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69606 (or 69587 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 37.

The spelling of 161130172087 in words is "one hundred sixty-one billion, one hundred thirty million, one hundred seventy-two thousand, eighty-seven".