131564645655 has 16 divisors (see below), whose sum is σ = 219655756800. Its totient is φ = 67117036448.

The previous prime is 131564645633. The next prime is 131564645659. The reversal of 131564645655 is 556546465131.

It is a cyclic number.

It is not a de Polignac number, because 131564645655 - 2¹¹ = 131564643607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131564645598 and 131564645607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131564645659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190673055 + ... + 190673744.

It is an arithmetic number, because the mean of its divisors is an integer number (13728484800).

Almost surely, 2^131564645655 is an apocalyptic number.

131564645655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131564645655 is a deficient number, since it is larger than the sum of its proper divisors (88091111145).

131564645655 is a wasteful number, since it uses less digits than its factorization.

131564645655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381346830.

The product of its digits is 6480000, while the sum is 51.

The spelling of 131564645655 in words is "one hundred thirty-one billion, five hundred sixty-four million, six hundred forty-five thousand, six hundred fifty-five".