161615748 has 96 divisors (see below), whose sum is σ = 457712640. Its totient is φ = 43355520.

The previous prime is 161615747. The next prime is 161615759. The reversal of 161615748 is 847516161.

It is a super-2 number, since 2×161615748² = 52239300003199008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161615747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 208690 + ... + 209462.

It is an arithmetic number, because the mean of its divisors is an integer number (4767840).

Almost surely, 2^161615748 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161615748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228856320).

161615748 is an abundant number, since it is smaller than the sum of its proper divisors (296096892).

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

161615748 is a wasteful number, since it uses less digits than its factorization.

161615748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937 (or 935 counting only the distinct ones).

The product of its digits is 40320, while the sum is 39.

The square root of 161615748 is about 12712.8182556033. The cubic root of 161615748 is about 544.7048290828.

The spelling of 161615748 in words is "one hundred sixty-one million, six hundred fifteen thousand, seven hundred forty-eight".