136609891466 has 16 divisors (see below), whose sum is σ = 208793910600. Its totient is φ = 67012078848.

The previous prime is 136609891409. The next prime is 136609891471. The reversal of 136609891466 is 664198906631.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 104638663441 + 31971228025 = 323479^2 + 178805^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2432390 + ... + 2487918.

Almost surely, 2^136609891466 is an apocalyptic number.

136609891466 is a deficient number, since it is larger than the sum of its proper divisors (72184019134).

136609891466 is a wasteful number, since it uses less digits than its factorization.

136609891466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78793.

The product of its (nonzero) digits is 10077696, while the sum is 59.

The spelling of 136609891466 in words is "one hundred thirty-six billion, six hundred nine million, eight hundred ninety-one thousand, four hundred sixty-six".