161568264 has 128 divisors (see below), whose sum is σ = 479001600. Its totient is φ = 44770560.

The previous prime is 161568263. The next prime is 161568269. The reversal of 161568264 is 462865161.

It is a happy number.

161568264 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161568264² = 52208607863947392, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (161568263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 614197 + ... + 614459.

It is an arithmetic number, because the mean of its divisors is an integer number (3742200).

Almost surely, 2^161568264 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 161568264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239500800).

161568264 is an abundant number, since it is smaller than the sum of its proper divisors (317433336).

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

161568264 is a wasteful number, since it uses less digits than its factorization.

161568264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475 (or 471 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 161568264 is about 12710.9505545415. The cubic root of 161568264 is about 544.6514776449.

The spelling of 161568264 in words is "one hundred sixty-one million, five hundred sixty-eight thousand, two hundred sixty-four".