161818752000 has 352 divisors, whose sum is σ = 548494861824. Its totient is φ = 42332160000.

The previous prime is 161818751981. The next prime is 161818752127. The reversal of 161818752000 is 257818161.

It is a self number, because there is not a number n which added to its sum of digits gives 161818752000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20348025 + ... + 20355975.

Almost surely, 2^161818752000 is an apocalyptic number.

161818752000 is a gapful number since it is divisible by the number (10) 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 161818752000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274247430912).

161818752000 is an abundant number, since it is smaller than the sum of its proper divisors (386676109824).

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

161818752000 is an equidigital number, since it uses as much as digits as its factorization.

161818752000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8042 (or 8014 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 39.

The spelling of 161818752000 in words is "one hundred sixty-one billion, eight hundred eighteen million, seven hundred fifty-two thousand".