131657053618 has 8 divisors (see below), whose sum is σ = 197913967020. Its totient is φ = 65685731280.

The previous prime is 131657053601. The next prime is 131657053637. The reversal of 131657053618 is 816350756131.

It can be written as a sum of positive squares in 2 ways, for example, as 127451142009 + 4205911609 = 357003^2 + 64853^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71396613 + ... + 71398456.

Almost surely, 2^131657053618 is an apocalyptic number.

131657053618 is a deficient number, since it is larger than the sum of its proper divisors (66256913402).

131657053618 is a wasteful number, since it uses less digits than its factorization.

131657053618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142795532.

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 131657053618 in words is "one hundred thirty-one billion, six hundred fifty-seven million, fifty-three thousand, six hundred eighteen".