161680970 has 32 divisors (see below), whose sum is σ = 318007296. Its totient is φ = 58696000.

The previous prime is 161680969. The next prime is 161680973. The reversal of 161680970 is 79086161.

It is a super-2 number, since 2×161680970² = 52281472120281800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161680973) 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, 125972 + ... + 127248.

It is an arithmetic number, because the mean of its divisors is an integer number (9937728).

Almost surely, 2^161680970 is an apocalyptic number.

161680970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161680970 is a deficient number, since it is larger than the sum of its proper divisors (156326326).

161680970 is a wasteful number, since it uses less digits than its factorization.

161680970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2446.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 161680970 is about 12715.3832030340. The cubic root of 161680970 is about 544.7780933135.

The spelling of 161680970 in words is "one hundred sixty-one million, six hundred eighty thousand, nine hundred seventy".