161012512 has 48 divisors (see below), whose sum is σ = 341494272. Its totient is φ = 74511360.

The previous prime is 161012473. The next prime is 161012539. The reversal of 161012512 is 215210161.

It is a self number, because there is not a number n which added to its sum of digits gives 161012512.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19288 + ... + 26344.

It is an arithmetic number, because the mean of its divisors is an integer number (7114464).

Almost surely, 2^161012512 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 161012512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170747136).

161012512 is an abundant number, since it is smaller than the sum of its proper divisors (180481760).

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

161012512 is a wasteful number, since it uses less digits than its factorization.

161012512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7121 (or 7113 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 161012512 is about 12689.0705727409. The cubic root of 161012512 is about 544.0262746825.

Adding to 161012512 its reverse (215210161), we get a palindrome (376222673).

The spelling of 161012512 in words is "one hundred sixty-one million, twelve thousand, five hundred twelve".