131078487818 has 16 divisors (see below), whose sum is σ = 201261978720. Its totient is φ = 63992248656.

The previous prime is 131078487817. The next prime is 131078487823. The reversal of 131078487818 is 818784870131.

It is a super-2 number, since 2×131078487818² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131078487817) 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, 27905 + ... + 512772.

It is an arithmetic number, because the mean of its divisors is an integer number (12578873670).

Almost surely, 2^131078487818 is an apocalyptic number.

131078487818 is a deficient number, since it is larger than the sum of its proper divisors (70183490902).

131078487818 is a wasteful number, since it uses less digits than its factorization.

131078487818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543541.

The product of its (nonzero) digits is 2408448, while the sum is 56.

The spelling of 131078487818 in words is "one hundred thirty-one billion, seventy-eight million, four hundred eighty-seven thousand, eight hundred eighteen".