131523663646 has 16 divisors (see below), whose sum is σ = 198520299648. Its totient is φ = 65350330200.

The previous prime is 131523663641. The next prime is 131523663647. The reversal of 131523663646 is 646366325131.

It is a super-2 number, since 2×131523663646² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131523663596 and 131523663605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131523663641) 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, 3309031 + ... + 3348541.

It is an arithmetic number, because the mean of its divisors is an integer number (12407518728).

Almost surely, 2^131523663646 is an apocalyptic number.

131523663646 is a deficient number, since it is larger than the sum of its proper divisors (66996636002).

131523663646 is a wasteful number, since it uses less digits than its factorization.

131523663646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49887.

The product of its digits is 1399680, while the sum is 46.

Adding to 131523663646 its reverse (646366325131), we get a palindrome (777889988777).

The spelling of 131523663646 in words is "one hundred thirty-one billion, five hundred twenty-three million, six hundred sixty-three thousand, six hundred forty-six".