136421848274557 has 2 divisors, whose sum is σ = 136421848274558. Its totient is φ = 136421848274556.

The previous prime is 136421848274521. The next prime is 136421848274567. The reversal of 136421848274557 is 755472848124631.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136420274248281 + 1574026276 = 11679909^2 + 39674^2 .

It is a cyclic number.

It is not a de Polignac number, because 136421848274557 - 2³⁹ = 135872092460669 is a prime.

It is a super-2 number, since 2×136421848274557² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 136421848274492 and 136421848274501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136421848274507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68210924137278 + 68210924137279.

It is an arithmetic number, because the mean of its divisors is an integer number (68210924137279).

Almost surely, 2^{136421848274557} is an apocalyptic number.

It is an amenable number.

136421848274557 is a deficient number, since it is larger than the sum of its proper divisors (1).

136421848274557 is an equidigital number, since it uses as much as digits as its factorization.

136421848274557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 361267200, while the sum is 67.

The spelling of 136421848274557 in words is "one hundred thirty-six trillion, four hundred twenty-one billion, eight hundred forty-eight million, two hundred seventy-four thousand, five hundred fifty-seven".