161507616 has 48 divisors (see below), whose sum is σ = 448900704. Its totient is φ = 50668544.

The previous prime is 161507597. The next prime is 161507617. The reversal of 161507616 is 616705161.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (161507617) 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, 47850 + ... + 51113.

It is an arithmetic number, because the mean of its divisors is an integer number (9352098).

Almost surely, 2^161507616 is an apocalyptic number.

161507616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161507616 is an abundant number, since it is smaller than the sum of its proper divisors (287393088).

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

161507616 is a wasteful number, since it uses less digits than its factorization.

161507616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98993 (or 98985 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 161507616 is about 12708.5646711185. The cubic root of 161507616 is about 544.5833203720.

The spelling of 161507616 in words is "one hundred sixty-one million, five hundred seven thousand, six hundred sixteen".