136560905781 has 8 divisors (see below), whose sum is σ = 182085205344. Its totient is φ = 91038605040.

The previous prime is 136560905771. The next prime is 136560905807. The reversal of 136560905781 is 187509065631.

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

It is not a de Polignac number, because 136560905781 - 2¹⁰ = 136560904757 is a prime.

It is a super-2 number, since 2×136560905781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136560905771) 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, 332275 + ... + 619296.

It is an arithmetic number, because the mean of its divisors is an integer number (22760650668).

Almost surely, 2^136560905781 is an apocalyptic number.

It is an amenable number.

136560905781 is a deficient number, since it is larger than the sum of its proper divisors (45524299563).

136560905781 is an equidigital number, since it uses as much as digits as its factorization.

136560905781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999411.

The product of its (nonzero) digits is 1360800, while the sum is 51.

The spelling of 136560905781 in words is "one hundred thirty-six billion, five hundred sixty million, nine hundred five thousand, seven hundred eighty-one".