161401584648 has 64 divisors (see below), whose sum is σ = 406051272000. Its totient is φ = 53461562112.

The previous prime is 161401584583. The next prime is 161401584653. The reversal of 161401584648 is 846485104161.

It is a junction number, because it is equal to n+sod(n) for n = 161401584597 and 161401584606.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3898923 + ... + 3940101.

It is an arithmetic number, because the mean of its divisors is an integer number (6344551125).

Almost surely, 2^161401584648 is an apocalyptic number.

It is an amenable number.

161401584648 is an abundant number, since it is smaller than the sum of its proper divisors (244649687352).

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

161401584648 is a wasteful number, since it uses less digits than its factorization.

161401584648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42214 (or 42210 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 48.

The spelling of 161401584648 in words is "one hundred sixty-one billion, four hundred one million, five hundred eighty-four thousand, six hundred forty-eight".