161680231963 has 8 divisors (see below), whose sum is σ = 167149642400. Its totient is φ = 156268699200.

The previous prime is 161680231961. The next prime is 161680231981. The reversal of 161680231963 is 369132086161.

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

It is a cyclic number.

It is not a de Polignac number, because 161680231963 - 2¹ = 161680231961 is a prime.

It is a super-2 number, since 2×161680231963² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161680231961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14463738 + ... + 14474911.

It is an arithmetic number, because the mean of its divisors is an integer number (20893705300).

Almost surely, 2^161680231963 is an apocalyptic number.

161680231963 is a deficient number, since it is larger than the sum of its proper divisors (5469410437).

161680231963 is a wasteful number, since it uses less digits than its factorization.

161680231963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28938837.

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 161680231963 in words is "one hundred sixty-one billion, six hundred eighty million, two hundred thirty-one thousand, nine hundred sixty-three".