172142239064 has 8 divisors (see below), whose sum is σ = 322766698260. Its totient is φ = 86071119528.

The previous prime is 172142239063. The next prime is 172142239067. The reversal of 172142239064 is 460932241271.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172142239063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10758889934 + ... + 10758889949.

Almost surely, 2^172142239064 is an apocalyptic number.

It is an amenable number.

172142239064 is a deficient number, since it is larger than the sum of its proper divisors (150624459196).

172142239064 is a wasteful number, since it uses less digits than its factorization.

172142239064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21517779889 (or 21517779885 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 172142239064 in words is "one hundred seventy-two billion, one hundred forty-two million, two hundred thirty-nine thousand, sixty-four".