855787739129 has 4 divisors (see below), whose sum is σ = 855792101760. Its totient is φ = 855783376500.

The previous prime is 855787739119. The next prime is 855787739201. The reversal of 855787739129 is 921937787558.

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 855787739129 - 2⁴ = 855787739113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855787739119) 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, 1872497 + ... + 2284254.

It is an arithmetic number, because the mean of its divisors is an integer number (213948025440).

Almost surely, 2^855787739129 is an apocalyptic number.

It is an amenable number.

855787739129 is a deficient number, since it is larger than the sum of its proper divisors (4362631).

855787739129 is a wasteful number, since it uses less digits than its factorization.

855787739129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4362630.

The product of its digits is 266716800, while the sum is 71.

The spelling of 855787739129 in words is "eight hundred fifty-five billion, seven hundred eighty-seven million, seven hundred thirty-nine thousand, one hundred twenty-nine".