172112248639 has 4 divisors (see below), whose sum is σ = 175774211424. Its totient is φ = 168450285856.

The previous prime is 172112248621. The next prime is 172112248667. The reversal of 172112248639 is 936842211271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936842211271 = 41 ⋅22849810031.

It is a cyclic number.

It is not a de Polignac number, because 172112248639 - 2¹¹ = 172112246591 is a prime.

It is a super-2 number, since 2×172112248639² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172112248339) 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, 1830981322 + ... + 1830981415.

It is an arithmetic number, because the mean of its divisors is an integer number (43943552856).

Almost surely, 2^172112248639 is an apocalyptic number.

172112248639 is a deficient number, since it is larger than the sum of its proper divisors (3661962785).

172112248639 is an equidigital number, since it uses as much as digits as its factorization.

172112248639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3661962784.

The product of its digits is 290304, while the sum is 46.

The spelling of 172112248639 in words is "one hundred seventy-two billion, one hundred twelve million, two hundred forty-eight thousand, six hundred thirty-nine".