135373656394 has 4 divisors (see below), whose sum is σ = 203060484594. Its totient is φ = 67686828196.

The previous prime is 135373656389. The next prime is 135373656419. The reversal of 135373656394 is 493656373531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 493656373531 = 457 ⋅1080210883.

It can be written as a sum of positive squares in only one way, i.e., 127266995025 + 8106661369 = 356745^2 + 90037^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33843414097 + ... + 33843414100.

Almost surely, 2^135373656394 is an apocalyptic number.

135373656394 is a deficient number, since it is larger than the sum of its proper divisors (67686828200).

135373656394 is an equidigital number, since it uses as much as digits as its factorization.

135373656394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67686828199.

The product of its digits is 18370800, while the sum is 55.

The spelling of 135373656394 in words is "one hundred thirty-five billion, three hundred seventy-three million, six hundred fifty-six thousand, three hundred ninety-four".