162231193728 has 72 divisors (see below), whose sum is σ = 466876501455. Its totient is φ = 54072507648.

The previous prime is 162231193721. The next prime is 162231193757. The reversal of 162231193728 is 827391132261.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

162231193728 is a `hidden beast` number, since 1 + 622 + 3 + 1 + 19 + 3 + 7 + 2 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 81115596864 + 81115596864 = 284808^2 + 284808^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=284808.

It is not an unprimeable number, because it can be changed into a prime (162231193721) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 13664851 + ... + 13676717.

Almost surely, 2^162231193728 is an apocalyptic number.

162231193728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

162231193728 is an abundant number, since it is smaller than the sum of its proper divisors (304645307727).

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

162231193728 is an frugal number, since it uses more digits than its factorization.

162231193728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23754 (or 11872 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The spelling of 162231193728 in words is "one hundred sixty-two billion, two hundred thirty-one million, one hundred ninety-three thousand, seven hundred twenty-eight".