136556045561 has 8 divisors (see below), whose sum is σ = 147278880840. Its totient is φ = 125864428032.

The previous prime is 136556045557. The next prime is 136556045603. The reversal of 136556045561 is 165540655631.

It can be written as a sum of positive squares in 4 ways, for example, as 3025000000 + 133531045561 = 55000^2 + 365419^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 136556045561 - 2² = 136556045557 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (136556045501) 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, 7795346 + ... + 7812843.

It is an arithmetic number, because the mean of its divisors is an integer number (18409860105).

Almost surely, 2^136556045561 is an apocalyptic number.

It is an amenable number.

136556045561 is a deficient number, since it is larger than the sum of its proper divisors (10722835279).

136556045561 is a wasteful number, since it uses less digits than its factorization.

136556045561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15608875.

The product of its (nonzero) digits is 1620000, while the sum is 47.

The spelling of 136556045561 in words is "one hundred thirty-six billion, five hundred fifty-six million, forty-five thousand, five hundred sixty-one".