136723730540465 has 4 divisors (see below), whose sum is σ = 164068476648564. Its totient is φ = 109378984432368.

The previous prime is 136723730540447. The next prime is 136723730540489. The reversal of 136723730540465 is 564045037327631.

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 103789801801984 + 32933928738481 = 10187728^2 + 5738809^2 .

It is a cyclic number.

It is not a de Polignac number, because 136723730540465 - 2⁶ = 136723730540401 is a prime.

It is a super-2 number, since 2×136723730540465² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136723730540465.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13672373054042 + ... + 13672373054051.

It is an arithmetic number, because the mean of its divisors is an integer number (41017119162141).

Almost surely, 2^{136723730540465} is an apocalyptic number.

It is an amenable number.

136723730540465 is a deficient number, since it is larger than the sum of its proper divisors (27344746108099).

136723730540465 is an equidigital number, since it uses as much as digits as its factorization.

136723730540465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27344746108098.

The product of its (nonzero) digits is 38102400, while the sum is 56.

The spelling of 136723730540465 in words is "one hundred thirty-six trillion, seven hundred twenty-three billion, seven hundred thirty million, five hundred forty thousand, four hundred sixty-five".