131647785466 has 24 divisors (see below), whose sum is σ = 208625078304. Its totient is φ = 62295703560.

The previous prime is 131647785439. The next prime is 131647785469. The reversal of 131647785466 is 664587746131.

It is a happy number.

It is a super-2 number, since 2×131647785466² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131647785466.

It is not an unprimeable number, because it can be changed into a prime (131647785469) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 616981 + ... + 802471.

It is an arithmetic number, because the mean of its divisors is an integer number (8692711596).

Almost surely, 2^131647785466 is an apocalyptic number.

131647785466 is a deficient number, since it is larger than the sum of its proper divisors (76977292838).

131647785466 is a wasteful number, since it uses less digits than its factorization.

131647785466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186514 (or 186495 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 58.

The spelling of 131647785466 in words is "one hundred thirty-one billion, six hundred forty-seven million, seven hundred eighty-five thousand, four hundred sixty-six".