161331745102 has 16 divisors (see below), whose sum is σ = 272513447424. Its totient is φ = 70967043000.

The previous prime is 161331744997. The next prime is 161331745121. The reversal of 161331745102 is 201547133161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118277724 + ... + 118279087.

It is an arithmetic number, because the mean of its divisors is an integer number (17032090464).

Almost surely, 2^161331745102 is an apocalyptic number.

161331745102 is a deficient number, since it is larger than the sum of its proper divisors (111181702322).

161331745102 is a wasteful number, since it uses less digits than its factorization.

161331745102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236556855.

The product of its (nonzero) digits is 15120, while the sum is 34.

Adding to 161331745102 its reverse (201547133161), we get a palindrome (362878878263).

The spelling of 161331745102 in words is "one hundred sixty-one billion, three hundred thirty-one million, seven hundred forty-five thousand, one hundred two".