135460661623 has 4 divisors (see below), whose sum is σ = 154812184720. Its totient is φ = 116109138528.

The previous prime is 135460661579. The next prime is 135460661647. The reversal of 135460661623 is 326166064531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 326166064531 = 17807 ⋅18316733.

It is a cyclic number.

It is not a de Polignac number, because 135460661623 - 2¹³ = 135460653431 is a prime.

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 135460661623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135460661683) 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, 9675761538 + ... + 9675761551.

It is an arithmetic number, because the mean of its divisors is an integer number (38703046180).

Almost surely, 2^135460661623 is an apocalyptic number.

135460661623 is a deficient number, since it is larger than the sum of its proper divisors (19351523097).

135460661623 is an equidigital number, since it uses as much as digits as its factorization.

135460661623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19351523096.

The product of its (nonzero) digits is 466560, while the sum is 43.

The spelling of 135460661623 in words is "one hundred thirty-five billion, four hundred sixty million, six hundred sixty-one thousand, six hundred twenty-three".