161587767 has 16 divisors (see below), whose sum is σ = 235434240. Its totient is φ = 97766400.

The previous prime is 161587757. The next prime is 161587817. The reversal of 161587767 is 767785161.

It is a happy number.

It is not a de Polignac number, because 161587767 - 2⁸ = 161587511 is a prime.

It is a super-2 number, since 2×161587767² = 52221212888092578, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161587757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17334 + ... + 24972.

It is an arithmetic number, because the mean of its divisors is an integer number (14714640).

Almost surely, 2^161587767 is an apocalyptic number.

161587767 is a deficient number, since it is larger than the sum of its proper divisors (73846473).

161587767 is a wasteful number, since it uses less digits than its factorization.

161587767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8294.

The product of its digits is 493920, while the sum is 48.

The square root of 161587767 is about 12711.7177045433. The cubic root of 161587767 is about 544.6733918297.

The spelling of 161587767 in words is "one hundred sixty-one million, five hundred eighty-seven thousand, seven hundred sixty-seven".