854394329881 has 4 divisors (see below), whose sum is σ = 904652819892. Its totient is φ = 804135839872.

The previous prime is 854394329879. The next prime is 854394329953. The reversal of 854394329881 is 188923493458.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 429660585225 + 424733744656 = 655485^2 + 651716^2 .

It is a cyclic number.

It is not a de Polignac number, because 854394329881 - 2¹ = 854394329879 is a prime.

It is a super-2 number, since 2×854394329881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (854394329801) 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, 25129244980 + ... + 25129245013.

It is an arithmetic number, because the mean of its divisors is an integer number (226163204973).

Almost surely, 2^854394329881 is an apocalyptic number.

It is an amenable number.

854394329881 is a deficient number, since it is larger than the sum of its proper divisors (50258490011).

854394329881 is a wasteful number, since it uses less digits than its factorization.

854394329881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50258490010.

The product of its digits is 59719680, while the sum is 64.

The spelling of 854394329881 in words is "eight hundred fifty-four billion, three hundred ninety-four million, three hundred twenty-nine thousand, eight hundred eighty-one".