161942220010 has 32 divisors (see below), whose sum is σ = 296877804480. Its totient is φ = 63584199168.

The previous prime is 161942219969. The next prime is 161942220049. The reversal of 161942220010 is 10022249161.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193149 + ... + 600991.

It is an arithmetic number, because the mean of its divisors is an integer number (9277431390).

Almost surely, 2^161942220010 is an apocalyptic number.

161942220010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161942220010 is a deficient number, since it is larger than the sum of its proper divisors (134935584470).

161942220010 is a wasteful number, since it uses less digits than its factorization.

161942220010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408582.

The product of its (nonzero) digits is 1728, while the sum is 28.

Adding to 161942220010 its reverse (10022249161), we get a palindrome (171964469171).

The spelling of 161942220010 in words is "one hundred sixty-one billion, nine hundred forty-two million, two hundred twenty thousand, ten".