136603354411561 has 4 divisors (see below), whose sum is σ = 136830647847124. Its totient is φ = 136376060976000.

The previous prime is 136603354411547. The next prime is 136603354411583. The reversal of 136603354411561 is 165114453306631.

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 122871549545536 + 13731804866025 = 11084744^2 + 3705645^2 .

It is a cyclic number.

It is not a de Polignac number, because 136603354411561 - 2⁵ = 136603354411529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136603354411261) 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, 113646716880 + ... + 113646718081.

It is an arithmetic number, because the mean of its divisors is an integer number (34207661961781).

Almost surely, 2^{136603354411561} is an apocalyptic number.

It is an amenable number.

136603354411561 is a deficient number, since it is larger than the sum of its proper divisors (227293435563).

136603354411561 is an equidigital number, since it uses as much as digits as its factorization.

136603354411561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227293435562.

The product of its (nonzero) digits is 2332800, while the sum is 49.

The spelling of 136603354411561 in words is "one hundred thirty-six trillion, six hundred three billion, three hundred fifty-four million, four hundred eleven thousand, five hundred sixty-one".