161623765252 has 24 divisors (see below), whose sum is σ = 288987342336. Its totient is φ = 79057475328.

The previous prime is 161623765249. The next prime is 161623765361. The reversal of 161623765252 is 252567326161.

It is a happy number.

It is a super-2 number, since 2×161623765252² (a number of 23 digits) contains 22 as substring.

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, 238213 + ... + 616435.

It is an arithmetic number, because the mean of its divisors is an integer number (12041139264).

Almost surely, 2^161623765252 is an apocalyptic number.

It is an amenable number.

161623765252 is a deficient number, since it is larger than the sum of its proper divisors (127363577084).

161623765252 is a wasteful number, since it uses less digits than its factorization.

161623765252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380547 (or 380545 counting only the distinct ones).

The product of its digits is 907200, while the sum is 46.

The spelling of 161623765252 in words is "one hundred sixty-one billion, six hundred twenty-three million, seven hundred sixty-five thousand, two hundred fifty-two".