136262809561 has 4 divisors (see below), whose sum is σ = 143434536400. Its totient is φ = 129091082724.

The previous prime is 136262809549. The next prime is 136262809567. The reversal of 136262809561 is 165908262631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 165908262631 = 41 ⋅4046542991.

It is a cyclic number.

It is not a de Polignac number, because 136262809561 - 2⁷ = 136262809433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136262809567) 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, 3585863391 + ... + 3585863428.

It is an arithmetic number, because the mean of its divisors is an integer number (35858634100).

Almost surely, 2^136262809561 is an apocalyptic number.

It is an amenable number.

136262809561 is a deficient number, since it is larger than the sum of its proper divisors (7171726839).

136262809561 is an equidigital number, since it uses as much as digits as its factorization.

136262809561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7171726838.

The product of its (nonzero) digits is 933120, while the sum is 49.

The spelling of 136262809561 in words is "one hundred thirty-six billion, two hundred sixty-two million, eight hundred nine thousand, five hundred sixty-one".