5172172126940 has 96 divisors (see below), whose sum is σ = 13374779128704. Its totient is φ = 1636086389760.

The previous prime is 5172172126937. The next prime is 5172172126969. The reversal of 5172172126940 is 496212712715.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2923010 + ... + 4346070.

It is an arithmetic number, because the mean of its divisors is an integer number (139320615924).

Almost surely, 2^{5172172126940} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5172172126940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6687389564352).

5172172126940 is an abundant number, since it is smaller than the sum of its proper divisors (8202607001764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5172172126940 is a wasteful number, since it uses less digits than its factorization.

5172172126940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425087 (or 1425085 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 47.

The spelling of 5172172126940 in words is "five trillion, one hundred seventy-two billion, one hundred seventy-two million, one hundred twenty-six thousand, nine hundred forty".