8461881594 has 48 divisors (see below), whose sum is σ = 19150054560. Its totient is φ = 2800312560.

The previous prime is 8461881581. The next prime is 8461881599. The reversal of 8461881594 is 4951881648.

It is a happy number.

8461881594 is a `hidden beast` number, since 8 + 4 + 618 + 8 + 15 + 9 + 4 = 666.

It is a super-2 number, since 2×8461881594² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 8461881594.

It is not an unprimeable number, because it can be changed into a prime (8461881599) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4924 + ... + 130184.

It is an arithmetic number, because the mean of its divisors is an integer number (398959470).

Almost surely, 2^8461881594 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8461881594, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9575027280).

8461881594 is an abundant number, since it is smaller than the sum of its proper divisors (10688172966).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8461881594 is a wasteful number, since it uses less digits than its factorization.

8461881594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125417 (or 125405 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 54.

The square root of 8461881594 is about 91988.4862034374. The cubic root of 8461881594 is about 2037.7722697062.

Adding to 8461881594 its sum of digits (54), we get a palindrome (8461881648).

The spelling of 8461881594 in words is "eight billion, four hundred sixty-one million, eight hundred eighty-one thousand, five hundred ninety-four".