538181172000 has 960 divisors, whose sum is σ = 2106289785600. Its totient is φ = 134120448000.

The previous prime is 538181171989. The next prime is 538181172047. The reversal of 538181172000 is 271181835.

538181172000 is a `hidden beast` number, since 538 + 1 + 8 + 117 + 2 + 0 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1096091755 + ... + 1096092245.

It is an arithmetic number, because the mean of its divisors is an integer number (2194051860).

Almost surely, 2^538181172000 is an apocalyptic number.

538181172000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 538181172000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1053144892800).

538181172000 is an abundant number, since it is smaller than the sum of its proper divisors (1568108613600).

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

538181172000 is a wasteful number, since it uses less digits than its factorization.

538181172000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744 (or 717 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The spelling of 538181172000 in words is "five hundred thirty-eight billion, one hundred eighty-one million, one hundred seventy-two thousand".