131320646446 has 64 divisors (see below), whose sum is σ = 221438105856. Its totient is φ = 57893068800.

The previous prime is 131320646423. The next prime is 131320646447. The reversal of 131320646446 is 644646023131.

It is a super-2 number, since 2×131320646446² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131320646399 and 131320646408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131320646447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102353721 + ... + 102355003.

It is an arithmetic number, because the mean of its divisors is an integer number (3459970404).

Almost surely, 2^131320646446 is an apocalyptic number.

131320646446 is a deficient number, since it is larger than the sum of its proper divisors (90117459410).

131320646446 is a wasteful number, since it uses less digits than its factorization.

131320646446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2017.

The product of its (nonzero) digits is 248832, while the sum is 40.

Adding to 131320646446 its reverse (644646023131), we get a palindrome (775966669577).

The spelling of 131320646446 in words is "one hundred thirty-one billion, three hundred twenty million, six hundred forty-six thousand, four hundred forty-six".