161782648 has 64 divisors (see below), whose sum is σ = 329961600. Its totient is φ = 74188800.

The previous prime is 161782627. The next prime is 161782657. The reversal of 161782648 is 846287161.

161782648 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 403248 + ... + 403648.

It is an arithmetic number, because the mean of its divisors is an integer number (5155650).

Almost surely, 2^161782648 is an apocalyptic number.

It is an amenable number.

161782648 is an abundant number, since it is smaller than the sum of its proper divisors (168178952).

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

161782648 is a wasteful number, since it uses less digits than its factorization.

161782648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520 (or 516 counting only the distinct ones).

The product of its digits is 129024, while the sum is 43.

The square root of 161782648 is about 12719.3808025391. The cubic root of 161782648 is about 544.8922694786.

The spelling of 161782648 in words is "one hundred sixty-one million, seven hundred eighty-two thousand, six hundred forty-eight".