161825197952 has 32 divisors (see below), whose sum is σ = 351693970200. Its totient is φ = 73556907520.

The previous prime is 161825197951. The next prime is 161825197991. The reversal of 161825197952 is 259791528161.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161825197951) 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, 57464927 + ... + 57467742.

Almost surely, 2^161825197952 is an apocalyptic number.

It is an amenable number.

161825197952 is an abundant number, since it is smaller than the sum of its proper divisors (189868772248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161825197952 is a wasteful number, since it uses less digits than its factorization.

161825197952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114932694 (or 114932682 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 56.

The spelling of 161825197952 in words is "one hundred sixty-one billion, eight hundred twenty-five million, one hundred ninety-seven thousand, nine hundred fifty-two".