161662811310 has 512 divisors, whose sum is σ = 580375756800. Its totient is φ = 30925048320.

The previous prime is 161662811257. The next prime is 161662811351. The reversal of 161662811310 is 13118266161.

It is a happy number.

161662811310 is a `hidden beast` number, since 1 + 6 + 1 + 6 + 628 + 1 + 13 + 10 = 666.

It is a super-2 number, since 2×161662811310² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 158647981 + ... + 158648999.

It is an arithmetic number, because the mean of its divisors is an integer number (1133546400).

Almost surely, 2^161662811310 is an apocalyptic number.

161662811310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161662811310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290187878400).

161662811310 is an abundant number, since it is smaller than the sum of its proper divisors (418712945490).

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

161662811310 is a wasteful number, since it uses less digits than its factorization.

161662811310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653 (or 1647 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The spelling of 161662811310 in words is "one hundred sixty-one billion, six hundred sixty-two million, eight hundred eleven thousand, three hundred ten".