134085210781 has 4 divisors (see below), whose sum is σ = 134086420000. Its totient is φ = 134084001564.

The previous prime is 134085210773. The next prime is 134085210803. The reversal of 134085210781 is 187012580431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 134085210781 - 2³ = 134085210773 is a prime.

It is a super-2 number, since 2×134085210781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134085210731) 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, 419361 + ... + 666358.

It is an arithmetic number, because the mean of its divisors is an integer number (33521605000).

Almost surely, 2^134085210781 is an apocalyptic number.

It is an amenable number.

134085210781 is a deficient number, since it is larger than the sum of its proper divisors (1209219).

134085210781 is a wasteful number, since it uses less digits than its factorization.

134085210781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209218.

The product of its (nonzero) digits is 53760, while the sum is 40.

The spelling of 134085210781 in words is "one hundred thirty-four billion, eighty-five million, two hundred ten thousand, seven hundred eighty-one".