161375552252 has 12 divisors (see below), whose sum is σ = 282549932280. Its totient is φ = 80647000176.

The previous prime is 161375552251. The next prime is 161375552357. The reversal of 161375552252 is 252255573161.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161375552251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10185083 + ... + 10200914.

It is an arithmetic number, because the mean of its divisors is an integer number (23545827690).

Almost surely, 2^161375552252 is an apocalyptic number.

It is an amenable number.

161375552252 is a deficient number, since it is larger than the sum of its proper divisors (121174380028).

161375552252 is a wasteful number, since it uses less digits than its factorization.

161375552252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20387980 (or 20387978 counting only the distinct ones).

The product of its digits is 630000, while the sum is 44.

The spelling of 161375552252 in words is "one hundred sixty-one billion, three hundred seventy-five million, five hundred fifty-two thousand, two hundred fifty-two".