161386992000 has 1536 divisors, whose sum is σ = 674648432640. Its totient is φ = 38071296000.

The previous prime is 161386991999. The next prime is 161386992061. The reversal of 161386992000 is 299683161.

It is a happy number.

161386992000 is a `hidden beast` number, since 1 + 61 + 386 + 9 + 9 + 200 + 0 = 666.

It is a super-2 number, since 2×161386992000² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1566863949 + ... + 1566864051.

It is an arithmetic number, because the mean of its divisors is an integer number (439224240).

Almost surely, 2^161386992000 is an apocalyptic number.

161386992000 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 161386992000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337324216320).

161386992000 is an abundant number, since it is smaller than the sum of its proper divisors (513261440640).

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

161386992000 is a wasteful number, since it uses less digits than its factorization.

161386992000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The spelling of 161386992000 in words is "one hundred sixty-one billion, three hundred eighty-six million, nine hundred ninety-two thousand".