161950210633156 has 27 divisors (see below), whose sum is σ = 311520468498253. Its totient is φ = 73613604846320.

The previous prime is 161950210633103. The next prime is 161950210633201. The reversal of 161950210633156 is 651336012059161.

The square root of 161950210633156 is 12725966.

It is a perfect power (a square), and thus also a powerful number.

161950210633156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 132223551322500 + 29726659310656 = 11498850^2 + 5452216^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 279682026 + ... + 280260478.

Almost surely, 2^{161950210633156} is an apocalyptic number.

161950210633156 is the 12725966-th square number.

It is an amenable number.

161950210633156 is a deficient number, since it is larger than the sum of its proper divisors (149570257865097).

161950210633156 is an frugal number, since it uses more digits than its factorization.

161950210633156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156932 (or 578466 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 49.

The spelling of 161950210633156 in words is "one hundred sixty-one trillion, nine hundred fifty billion, two hundred ten million, six hundred thirty-three thousand, one hundred fifty-six".