161617497748 has 24 divisors (see below), whose sum is σ = 340247364800. Its totient is φ = 65619134208.

The previous prime is 161617497683. The next prime is 161617497751. The reversal of 161617497748 is 847794716161.

It is a super-2 number, since 2×161617497748² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151895613 + ... + 151896676.

Almost surely, 2^161617497748 is an apocalyptic number.

It is an amenable number.

161617497748 is an abundant number, since it is smaller than the sum of its proper divisors (178629867052).

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

161617497748 is a wasteful number, since it uses less digits than its factorization.

161617497748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303792319 (or 303792317 counting only the distinct ones).

The product of its digits is 14224896, while the sum is 61.

The spelling of 161617497748 in words is "one hundred sixty-one billion, six hundred seventeen million, four hundred ninety-seven thousand, seven hundred forty-eight".