136421354535161 has 4 divisors (see below), whose sum is σ = 136421858025972. Its totient is φ = 136420851044352.

The previous prime is 136421354535149. The next prime is 136421354535209. The reversal of 136421354535161 is 161535453124631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48041256192400 + 88380098342761 = 6931180^2 + 9401069^2 .

It is a cyclic number.

It is not a de Polignac number, because 136421354535161 - 2¹⁰ = 136421354534137 is a prime.

It is a super-2 number, since 2×136421354535161² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136421354525161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251338760 + ... + 251880953.

It is an arithmetic number, because the mean of its divisors is an integer number (34105464506493).

Almost surely, 2^{136421354535161} is an apocalyptic number.

It is an amenable number.

136421354535161 is a deficient number, since it is larger than the sum of its proper divisors (503490811).

136421354535161 is an equidigital number, since it uses as much as digits as its factorization.

136421354535161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503490810.

The product of its digits is 3888000, while the sum is 50.

The spelling of 136421354535161 in words is "one hundred thirty-six trillion, four hundred twenty-one billion, three hundred fifty-four million, five hundred thirty-five thousand, one hundred sixty-one".