161571724248 has 256 divisors, whose sum is σ = 471636172800. Its totient is φ = 45643136000.

The previous prime is 161571724229. The next prime is 161571724261. The reversal of 161571724248 is 842427175161.

It is a super-2 number, since 2×161571724248² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161571724197 and 161571724206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38366863 + ... + 38371073.

It is an arithmetic number, because the mean of its divisors is an integer number (1842328800).

Almost surely, 2^161571724248 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 161571724248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235818086400).

161571724248 is an abundant number, since it is smaller than the sum of its proper divisors (310064448552).

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

161571724248 is a wasteful number, since it uses less digits than its factorization.

161571724248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4414 (or 4410 counting only the distinct ones).

The product of its digits is 752640, while the sum is 48.

The spelling of 161571724248 in words is "one hundred sixty-one billion, five hundred seventy-one million, seven hundred twenty-four thousand, two hundred forty-eight".