134691356781 has 12 divisors (see below), whose sum is σ = 203013059808. Its totient is φ = 85890140424.

The previous prime is 134691356777. The next prime is 134691356791. The reversal of 134691356781 is 187653196431.

134691356781 is a `hidden beast` number, since 1 + 3 + 4 + 69 + 13 + 567 + 8 + 1 = 666.

It is not a de Polignac number, because 134691356781 - 2² = 134691356777 is a prime.

It is a super-2 number, since 2×134691356781² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134691356731) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 325341235 + ... + 325341648.

It is an arithmetic number, because the mean of its divisors is an integer number (16917754984).

Almost surely, 2^134691356781 is an apocalyptic number.

It is an amenable number.

134691356781 is a deficient number, since it is larger than the sum of its proper divisors (68321703027).

134691356781 is a wasteful number, since it uses less digits than its factorization.

134691356781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650682912 (or 650682909 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The spelling of 134691356781 in words is "one hundred thirty-four billion, six hundred ninety-one million, three hundred fifty-six thousand, seven hundred eighty-one".