161597710 has 8 divisors (see below), whose sum is σ = 290875896. Its totient is φ = 64639080.

The previous prime is 161597693. The next prime is 161597719. The reversal of 161597710 is 17795161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×161597710² = 52227639754488200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161597710.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161597719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8079876 + ... + 8079895.

It is an arithmetic number, because the mean of its divisors is an integer number (36359487).

Almost surely, 2^161597710 is an apocalyptic number.

161597710 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161597710 is a deficient number, since it is larger than the sum of its proper divisors (129278186).

161597710 is a wasteful number, since it uses less digits than its factorization.

161597710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16159778.

The product of its (nonzero) digits is 13230, while the sum is 37.

The square root of 161597710 is about 12712.1087943740. The cubic root of 161597710 is about 544.6845634189.

It can be divided in two parts, 161 and 597710, that added together give a triangular number (597871 = T₁₀₉₃).

The spelling of 161597710 in words is "one hundred sixty-one million, five hundred ninety-seven thousand, seven hundred ten".