161296380000 has 960 divisors, whose sum is σ = 682449546240. Its totient is φ = 36288000000.

The previous prime is 161296379969. The next prime is 161296380061. The reversal of 161296380000 is 83692161.

161296380000 is a `hidden beast` number, since 1 + 6 + 12 + 9 + 638 + 0 + 0 + 0 + 0 = 666.

It is a super-2 number, since 2×161296380000² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 268379700 + ... + 268380300.

It is an arithmetic number, because the mean of its divisors is an integer number (710884944).

Almost surely, 2^161296380000 is an apocalyptic number.

161296380000 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 161296380000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (341224773120).

161296380000 is an abundant number, since it is smaller than the sum of its proper divisors (521153166240).

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

161296380000 is an equidigital number, since it uses as much as digits as its factorization.

161296380000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 161296380000 in words is "one hundred sixty-one billion, two hundred ninety-six million, three hundred eighty thousand".