136213865477 has 2 divisors, whose sum is σ = 136213865478. Its totient is φ = 136213865476.

The previous prime is 136213865467. The next prime is 136213865503. The reversal of 136213865477 is 774568312631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134590661956 + 1623203521 = 366866^2 + 40289^2 .

It is a cyclic number.

It is not a de Polignac number, because 136213865477 - 2⁴ = 136213865461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136213865467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68106932738 + 68106932739.

It is an arithmetic number, because the mean of its divisors is an integer number (68106932739).

Almost surely, 2^136213865477 is an apocalyptic number.

It is an amenable number.

136213865477 is a deficient number, since it is larger than the sum of its proper divisors (1).

136213865477 is an equidigital number, since it uses as much as digits as its factorization.

136213865477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5080320, while the sum is 53.

The spelling of 136213865477 in words is "one hundred thirty-six billion, two hundred thirteen million, eight hundred sixty-five thousand, four hundred seventy-seven".