131016661338 has 16 divisors (see below), whose sum is σ = 262047242016. Its totient is φ = 43669900560.

The previous prime is 131016661331. The next prime is 131016661379. The reversal of 131016661338 is 833166610131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 131016661296 and 131016661305.

It is not an unprimeable number, because it can be changed into a prime (131016661331) 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, 455556 + ... + 685247.

It is an arithmetic number, because the mean of its divisors is an integer number (16377952626).

Almost surely, 2^131016661338 is an apocalyptic number.

131016661338 is an abundant number, since it is smaller than the sum of its proper divisors (131030580678).

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

131016661338 is a wasteful number, since it uses less digits than its factorization.

131016661338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159949.

The product of its (nonzero) digits is 46656, while the sum is 39.

The spelling of 131016661338 in words is "one hundred thirty-one billion, sixteen million, six hundred sixty-one thousand, three hundred thirty-eight".