136504201081 has 2 divisors, whose sum is σ = 136504201082. Its totient is φ = 136504201080.

The previous prime is 136504201063. The next prime is 136504201109. The reversal of 136504201081 is 180102405631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128605435456 + 7898765625 = 358616^2 + 88875^2 .

It is a cyclic number.

It is not a de Polignac number, because 136504201081 - 2¹⁵ = 136504168313 is a prime.

It is a super-2 number, since 2×136504201081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (136504201021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68252100540 + 68252100541.

It is an arithmetic number, because the mean of its divisors is an integer number (68252100541).

Almost surely, 2^136504201081 is an apocalyptic number.

It is an amenable number.

136504201081 is a deficient number, since it is larger than the sum of its proper divisors (1).

136504201081 is an equidigital number, since it uses as much as digits as its factorization.

136504201081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 31.

The spelling of 136504201081 in words is "one hundred thirty-six billion, five hundred four million, two hundred one thousand, eighty-one".