161087277 has 16 divisors (see below), whose sum is σ = 231560000. Its totient is φ = 99021312.

The previous prime is 161087243. The next prime is 161087293. The reversal of 161087277 is 772780161.

It is not a de Polignac number, because 161087277 - 2¹⁶ = 161021741 is a prime.

It is a super-2 number, since 2×161087277² = 51898221622549458, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161087207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47058 + ... + 50364.

It is an arithmetic number, because the mean of its divisors is an integer number (14472500).

Almost surely, 2^161087277 is an apocalyptic number.

It is an amenable number.

161087277 is a deficient number, since it is larger than the sum of its proper divisors (70472723).

161087277 is a wasteful number, since it uses less digits than its factorization.

161087277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4572.

The product of its (nonzero) digits is 32928, while the sum is 39.

The square root of 161087277 is about 12692.0162700810. The cubic root of 161087277 is about 544.1104665464.

The spelling of 161087277 in words is "one hundred sixty-one million, eighty-seven thousand, two hundred seventy-seven".