134404766781 has 8 divisors (see below), whose sum is σ = 179211768384. Its totient is φ = 89600471520.

The previous prime is 134404766777. The next prime is 134404766789. The reversal of 134404766781 is 187667404431.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 134404766781 - 2² = 134404766777 is a prime.

It is a super-2 number, since 2×134404766781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134404766789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557721 + ... + 761486.

It is an arithmetic number, because the mean of its divisors is an integer number (22401471048).

Almost surely, 2^134404766781 is an apocalyptic number.

It is an amenable number.

134404766781 is a deficient number, since it is larger than the sum of its proper divisors (44807001603).

134404766781 is a wasteful number, since it uses less digits than its factorization.

134404766781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353171.

The product of its (nonzero) digits is 2709504, while the sum is 51.

The spelling of 134404766781 in words is "one hundred thirty-four billion, four hundred four million, seven hundred sixty-six thousand, seven hundred eighty-one".