131628326181 has 8 divisors (see below), whose sum is σ = 191459383584. Its totient is φ = 79774743120.

The previous prime is 131628326153. The next prime is 131628326213. The reversal of 131628326181 is 181623826131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131628326181 - 2²⁶ = 131561217317 is a prime.

It is a super-2 number, since 2×131628326181² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131628326111) 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, 1994368546 + ... + 1994368611.

It is an arithmetic number, because the mean of its divisors is an integer number (23932422948).

Almost surely, 2^131628326181 is an apocalyptic number.

131628326181 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131628326181 is a deficient number, since it is larger than the sum of its proper divisors (59831057403).

131628326181 is a wasteful number, since it uses less digits than its factorization.

131628326181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3988737171.

The product of its digits is 82944, while the sum is 42.

The spelling of 131628326181 in words is "one hundred thirty-one billion, six hundred twenty-eight million, three hundred twenty-six thousand, one hundred eighty-one".