136453311026821 has 2 divisors, whose sum is σ = 136453311026822. Its totient is φ = 136453311026820.

The previous prime is 136453311026761. The next prime is 136453311026839. The reversal of 136453311026821 is 128620113354631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128582559330625 + 7870751696196 = 11339425^2 + 2805486^2 .

It is a cyclic number.

It is not a de Polignac number, because 136453311026821 - 2¹⁵ = 136453310994053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136453311021821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68226655513410 + 68226655513411.

It is an arithmetic number, because the mean of its divisors is an integer number (68226655513411).

Almost surely, 2^{136453311026821} is an apocalyptic number.

It is an amenable number.

136453311026821 is a deficient number, since it is larger than the sum of its proper divisors (1).

136453311026821 is an equidigital number, since it uses as much as digits as its factorization.

136453311026821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 136453311026821 in words is "one hundred thirty-six trillion, four hundred fifty-three billion, three hundred eleven million, twenty-six thousand, eight hundred twenty-one".