161882765188 has 12 divisors (see below), whose sum is σ = 288640025100. Its totient is φ = 79414186592.

The previous prime is 161882765159. The next prime is 161882765197. The reversal of 161882765188 is 881567288161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 124518648384 + 37364116804 = 352872^2 + 193298^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381798763 + ... + 381799186.

It is an arithmetic number, because the mean of its divisors is an integer number (24053335425).

Almost surely, 2^161882765188 is an apocalyptic number.

It is an amenable number.

161882765188 is a deficient number, since it is larger than the sum of its proper divisors (126757259912).

161882765188 is a wasteful number, since it uses less digits than its factorization.

161882765188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763598006 (or 763598004 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 61.

The spelling of 161882765188 in words is "one hundred sixty-one billion, eight hundred eighty-two million, seven hundred sixty-five thousand, one hundred eighty-eight".