161401672652 has 24 divisors (see below), whose sum is σ = 308241657360. Its totient is φ = 73337922560.

The previous prime is 161401672637. The next prime is 161401672657. The reversal of 161401672652 is 256276104161.

It is not an unprimeable number, because it can be changed into a prime (161401672657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 538277 + ... + 782652.

It is an arithmetic number, because the mean of its divisors is an integer number (12843402390).

Almost surely, 2^161401672652 is an apocalyptic number.

It is an amenable number.

161401672652 is a deficient number, since it is larger than the sum of its proper divisors (146839984708).

161401672652 is a wasteful number, since it uses less digits than its factorization.

161401672652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323721 (or 1323719 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 161401672652 in words is "one hundred sixty-one billion, four hundred one million, six hundred seventy-two thousand, six hundred fifty-two".