136556045557 has 2 divisors, whose sum is σ = 136556045558. Its totient is φ = 136556045556.

The previous prime is 136556045551. The next prime is 136556045603. The reversal of 136556045557 is 755540655631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133962588081 + 2593457476 = 366009^2 + 50926^2 .

It is a cyclic number.

It is not a de Polignac number, because 136556045557 - 2⁷ = 136556045429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136556045551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68278022778 + 68278022779.

It is an arithmetic number, because the mean of its divisors is an integer number (68278022779).

Almost surely, 2^136556045557 is an apocalyptic number.

It is an amenable number.

136556045557 is a deficient number, since it is larger than the sum of its proper divisors (1).

136556045557 is an equidigital number, since it uses as much as digits as its factorization.

136556045557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9450000, while the sum is 52.

The spelling of 136556045557 in words is "one hundred thirty-six billion, five hundred fifty-six million, forty-five thousand, five hundred fifty-seven".