131623311640 has 32 divisors (see below), whose sum is σ = 309028646880. Its totient is φ = 50360223232.

The previous prime is 131623311583. The next prime is 131623311689. The reversal of 131623311640 is 46113326131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71533489 + ... + 71535328.

It is an arithmetic number, because the mean of its divisors is an integer number (9657145215).

Almost surely, 2^131623311640 is an apocalyptic number.

131623311640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131623311640 is an abundant number, since it is smaller than the sum of its proper divisors (177405335240).

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

131623311640 is a wasteful number, since it uses less digits than its factorization.

131623311640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143068851 (or 143068847 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

Adding to 131623311640 its reverse (46113326131), we get a palindrome (177736637771).

The spelling of 131623311640 in words is "one hundred thirty-one billion, six hundred twenty-three million, three hundred eleven thousand, six hundred forty".