161620471848 has 128 divisors (see below), whose sum is σ = 466100490240. Its totient is φ = 46239936000.

The previous prime is 161620471847. The next prime is 161620471853. The reversal of 161620471848 is 848174026161.

It is a super-2 number, since 2×161620471848² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 161620471797 and 161620471806.

It is not an unprimeable number, because it can be changed into a prime (161620471841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94711 + ... + 576377.

It is an arithmetic number, because the mean of its divisors is an integer number (3641410080).

Almost surely, 2^161620471848 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 161620471848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233050245120).

161620471848 is an abundant number, since it is smaller than the sum of its proper divisors (304480018392).

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

161620471848 is a wasteful number, since it uses less digits than its factorization.

161620471848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481759 (or 481755 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 48.

The spelling of 161620471848 in words is "one hundred sixty-one billion, six hundred twenty million, four hundred seventy-one thousand, eight hundred forty-eight".