172144392672069 has 24 divisors (see below), whose sum is σ = 254778124130712. Its totient is φ = 111937281031680.

The previous prime is 172144392672053. The next prime is 172144392672079. The reversal of 172144392672069 is 960276293441271.

172144392672069 is a `hidden beast` number, since 1 + 7 + 21 + 443 + 92 + 6 + 7 + 20 + 69 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 73540743848100 + 98603648823969 = 8575590^2 + 9929937^2 .

It is not a de Polignac number, because 172144392672069 - 2⁴ = 172144392672053 is a prime.

It is a super-2 number, since 2×172144392672069² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 172144392671997 and 172144392672015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172144392672079) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53757654 + ... + 56869799.

It is an arithmetic number, because the mean of its divisors is an integer number (10615755172113).

Almost surely, 2^{172144392672069} is an apocalyptic number.

It is an amenable number.

172144392672069 is a deficient number, since it is larger than the sum of its proper divisors (82633731458643).

172144392672069 is a wasteful number, since it uses less digits than its factorization.

172144392672069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110631717 (or 110631714 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 63.

The spelling of 172144392672069 in words is "one hundred seventy-two trillion, one hundred forty-four billion, three hundred ninety-two million, six hundred seventy-two thousand, sixty-nine".