161765031210 has 64 divisors (see below), whose sum is σ = 403998312960. Its totient is φ = 41419990080.

The previous prime is 161765031199. The next prime is 161765031223. The reversal of 161765031210 is 12130567161.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 986596 + ... + 1138815.

It is an arithmetic number, because the mean of its divisors is an integer number (6312473640).

Almost surely, 2^161765031210 is an apocalyptic number.

161765031210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161765031210 is an abundant number, since it is smaller than the sum of its proper divisors (242233281750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161765031210 is a wasteful number, since it uses less digits than its factorization.

161765031210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125523.

The product of its (nonzero) digits is 7560, while the sum is 33.

Adding to 161765031210 its reverse (12130567161), we get a palindrome (173895598371).

The spelling of 161765031210 in words is "one hundred sixty-one billion, seven hundred sixty-five million, thirty-one thousand, two hundred ten".