161293232250 has 96 divisors (see below), whose sum is σ = 437679747648. Its totient is φ = 42859375200.

The previous prime is 161293232237. The next prime is 161293232257. The reversal of 161293232250 is 52232392161.

161293232250 is a `hidden beast` number, since 1 + 61 + 29 + 323 + 2 + 250 = 666.

It is not an unprimeable number, because it can be changed into a prime (161293232257) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 510097 + ... + 763403.

It is an arithmetic number, because the mean of its divisors is an integer number (4559164038).

Almost surely, 2^161293232250 is an apocalyptic number.

161293232250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161293232250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218839873824).

161293232250 is an abundant number, since it is smaller than the sum of its proper divisors (276386515398).

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

161293232250 is a wasteful number, since it uses less digits than its factorization.

161293232250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253613 (or 253600 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 161293232250 in words is "one hundred sixty-one billion, two hundred ninety-three million, two hundred thirty-two thousand, two hundred fifty".