131009643518 has 16 divisors (see below), whose sum is σ = 211640714880. Its totient is φ = 60463202976.

The previous prime is 131009643517. The next prime is 131009643539. The reversal of 131009643518 is 815346900131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131009643517) 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, 525971 + ... + 733937.

It is an arithmetic number, because the mean of its divisors is an integer number (13227544680).

Almost surely, 2^131009643518 is an apocalyptic number.

131009643518 is a deficient number, since it is larger than the sum of its proper divisors (80631071362).

131009643518 is a wasteful number, since it uses less digits than its factorization.

131009643518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232211.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 131009643518 in words is "one hundred thirty-one billion, nine million, six hundred forty-three thousand, five hundred eighteen".