133671616 has 28 divisors (see below), whose sum is σ = 285660592. Its totient is φ = 61694208.

The previous prime is 133671553. The next prime is 133671617. The reversal of 133671616 is 616176331.

It is not an unprimeable number, because it can be changed into a prime (133671617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79500 + ... + 81163.

It is an arithmetic number, because the mean of its divisors is an integer number (10202164).

Almost surely, 2^133671616 is an apocalyptic number.

133671616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

133671616 is an abundant number, since it is smaller than the sum of its proper divisors (151988976).

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

133671616 is a wasteful number, since it uses less digits than its factorization.

133671616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160688 (or 160678 counting only the distinct ones).

The product of its digits is 13608, while the sum is 34.

The square root of 133671616 is about 11561.6441737324. The cubic root of 133671616 is about 511.3046387206.

The spelling of 133671616 in words is "one hundred thirty-three million, six hundred seventy-one thousand, six hundred sixteen".