172051720052 has 12 divisors (see below), whose sum is σ = 301143215940. Its totient is φ = 86010801216.

The previous prime is 172051720051. The next prime is 172051720063. The reversal of 172051720052 is 250027150271.

It can be written as a sum of positive squares in 2 ways, for example, as 43295621776 + 128756098276 = 208076^2 + 358826^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172051720051) 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, 3738977 + ... + 3784712.

It is an arithmetic number, because the mean of its divisors is an integer number (25095267995).

Almost surely, 2^172051720052 is an apocalyptic number.

It is an amenable number.

172051720052 is a deficient number, since it is larger than the sum of its proper divisors (129091495888).

172051720052 is a wasteful number, since it uses less digits than its factorization.

172051720052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7529410 (or 7529408 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 32.

The spelling of 172051720052 in words is "one hundred seventy-two billion, fifty-one million, seven hundred twenty thousand, fifty-two".