136421352385 has 8 divisors (see below), whose sum is σ = 169350644520. Its totient is φ = 105373734144.

The previous prime is 136421352373. The next prime is 136421352391. The reversal of 136421352385 is 583253124631.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11532816 + 136409819569 = 3396^2 + 369337^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 136421352385 - 2⁷ = 136421352257 is a prime.

It is a super-2 number, since 2×136421352385² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 470418312 + ... + 470418601.

It is an arithmetic number, because the mean of its divisors is an integer number (21168830565).

Almost surely, 2^136421352385 is an apocalyptic number.

It is an amenable number.

136421352385 is a deficient number, since it is larger than the sum of its proper divisors (32929292135).

136421352385 is an equidigital number, since it uses as much as digits as its factorization.

136421352385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940836947.

The product of its digits is 518400, while the sum is 43.

The spelling of 136421352385 in words is "one hundred thirty-six billion, four hundred twenty-one million, three hundred fifty-two thousand, three hundred eighty-five".