161950149900 has 864 divisors, whose sum is σ = 695592979200. Its totient is φ = 31875379200.

The previous prime is 161950149877. The next prime is 161950149901. The reversal of 161950149900 is 9941059161.

161950149900 is a `hidden beast` number, since 1 + 6 + 19 + 501 + 49 + 90 + 0 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161950149901) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 27647772 + ... + 27653628.

Almost surely, 2^161950149900 is an apocalyptic number.

161950149900 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 161950149900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (347796489600).

161950149900 is an abundant number, since it is smaller than the sum of its proper divisors (533642829300).

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

161950149900 is a wasteful number, since it uses less digits than its factorization.

161950149900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5924 (or 5904 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 45.

The spelling of 161950149900 in words is "one hundred sixty-one billion, nine hundred fifty million, one hundred forty-nine thousand, nine hundred".