8465381881 has 4 divisors (see below), whose sum is σ = 9234962064. Its totient is φ = 7695801700.

The previous prime is 8465381879. The next prime is 8465381893. The reversal of 8465381881 is 1881835648.

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 8465381881 - 2¹ = 8465381879 is a prime.

It is a super-2 number, since 2×8465381881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8465381831) 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, 384790075 + ... + 384790096.

It is an arithmetic number, because the mean of its divisors is an integer number (2308740516).

Almost surely, 2^8465381881 is an apocalyptic number.

It is an amenable number.

8465381881 is a deficient number, since it is larger than the sum of its proper divisors (769580183).

8465381881 is a wasteful number, since it uses less digits than its factorization.

8465381881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769580182.

The product of its digits is 1474560, while the sum is 52.

The square root of 8465381881 is about 92007.5099163106. The cubic root of 8465381881 is about 2038.0532081882.

The spelling of 8465381881 in words is "eight billion, four hundred sixty-five million, three hundred eighty-one thousand, eight hundred eighty-one".