161210507432 has 48 divisors (see below), whose sum is σ = 327983228640. Its totient is φ = 74251764288.

The previous prime is 161210507413. The next prime is 161210507443. The reversal of 161210507432 is 234705012161.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 536003 + ... + 780845.

It is an arithmetic number, because the mean of its divisors is an integer number (6832983930).

Almost surely, 2^161210507432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161210507432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163991614320).

161210507432 is an abundant number, since it is smaller than the sum of its proper divisors (166772721208).

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

161210507432 is a wasteful number, since it uses less digits than its factorization.

161210507432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245362 (or 245345 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

Adding to 161210507432 its reverse (234705012161), we get a palindrome (395915519593).

The spelling of 161210507432 in words is "one hundred sixty-one billion, two hundred ten million, five hundred seven thousand, four hundred thirty-two".