12172815734 has 16 divisors (see below), whose sum is σ = 19496201472. Its totient is φ = 5686390248.

The previous prime is 12172815701. The next prime is 12172815737. The reversal of 12172815734 is 43751827121.

It is a junction number, because it is equal to n+sod(n) for n = 12172815691 and 12172815700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12172815737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3075074 + ... + 3079029.

It is an arithmetic number, because the mean of its divisors is an integer number (1218512592).

Almost surely, 2^12172815734 is an apocalyptic number.

12172815734 is a deficient number, since it is larger than the sum of its proper divisors (7323385738).

12172815734 is a wasteful number, since it uses less digits than its factorization.

12172815734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6154171.

The product of its digits is 94080, while the sum is 41.

The spelling of 12172815734 in words is "twelve billion, one hundred seventy-two million, eight hundred fifteen thousand, seven hundred thirty-four".