171612648978 has 8 divisors (see below), whose sum is σ = 343225297968. Its totient is φ = 57204216324.

The previous prime is 171612648971. The next prime is 171612649003. The reversal of 171612648978 is 879846216171.

It is a sphenic number, since it is the product of 3 distinct primes.

171612648978 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (171612648971) 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, 14301054076 + ... + 14301054087.

It is an arithmetic number, because the mean of its divisors is an integer number (42903162246).

Almost surely, 2^171612648978 is an apocalyptic number.

171612648978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

171612648978 is a wasteful number, since it uses less digits than its factorization.

171612648978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28602108168.

The product of its digits is 8128512, while the sum is 60.

The spelling of 171612648978 in words is "one hundred seventy-one billion, six hundred twelve million, six hundred forty-eight thousand, nine hundred seventy-eight".