161601370 has 32 divisors (see below), whose sum is σ = 333445248. Its totient is φ = 55238208.

The previous prime is 161601367. The next prime is 161601389. The reversal of 161601370 is 73106161.

It is a happy number.

161601370 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161601370² = 52230005571753800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20964 + ... + 27616.

It is an arithmetic number, because the mean of its divisors is an integer number (10420164).

Almost surely, 2^161601370 is an apocalyptic number.

161601370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161601370 is an abundant number, since it is smaller than the sum of its proper divisors (171843878).

161601370 is a wasteful number, since it uses less digits than its factorization.

161601370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7014.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 161601370 is about 12712.2527507913. The cubic root of 161601370 is about 544.6886755449.

It can be divided in two parts, 161 and 601370, that multiplied together give a triangular number (96820570 = T₁₃₉₁₅).

The spelling of 161601370 in words is "one hundred sixty-one million, six hundred one thousand, three hundred seventy".