161617016948 has 12 divisors (see below), whose sum is σ = 282833205732. Its totient is φ = 80807529600.

The previous prime is 161617016927. The next prime is 161617016963. The reversal of 161617016948 is 849610716161.

It can be written as a sum of positive squares in 2 ways, for example, as 55407510544 + 106209506404 = 235388^2 + 325898^2 .

It is a super-2 number, since 2×161617016948² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161617016896 and 161617016905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228398 + ... + 612698.

It is an arithmetic number, because the mean of its divisors is an integer number (23569433811).

Almost surely, 2^161617016948 is an apocalyptic number.

It is an amenable number.

161617016948 is a deficient number, since it is larger than the sum of its proper divisors (121216188784).

161617016948 is a wasteful number, since it uses less digits than its factorization.

161617016948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489442 (or 489440 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 50.

The spelling of 161617016948 in words is "one hundred sixty-one billion, six hundred seventeen million, sixteen thousand, nine hundred forty-eight".