161888266332 has 240 divisors, whose sum is σ = 489198280032. Its totient is φ = 46237962240.

The previous prime is 161888266321. The next prime is 161888266361. The reversal of 161888266332 is 233662888161.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5211607 + ... + 5242577.

Almost surely, 2^161888266332 is an apocalyptic number.

161888266332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161888266332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244599140016).

161888266332 is an abundant number, since it is smaller than the sum of its proper divisors (327310013700).

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

161888266332 is a wasteful number, since it uses less digits than its factorization.

161888266332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31090 (or 31079 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 54.

The spelling of 161888266332 in words is "one hundred sixty-one billion, eight hundred eighty-eight million, two hundred sixty-six thousand, three hundred thirty-two".