8461538478 has 96 divisors (see below), whose sum is σ = 19523212800. Its totient is φ = 2745752256.

The previous prime is 8461538447. The next prime is 8461538479. The reversal of 8461538478 is 8748351648.

8461538478 is a `hidden beast` number, since 8 + 4 + 61 + 538 + 47 + 8 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8461538479) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2801253 + ... + 2804271.

It is an arithmetic number, because the mean of its divisors is an integer number (203366800).

Almost surely, 2^8461538478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8461538478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9761606400).

8461538478 is an abundant number, since it is smaller than the sum of its proper divisors (11061674322).

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

8461538478 is a wasteful number, since it uses less digits than its factorization.

8461538478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3188 (or 3176 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 54.

The square root of 8461538478 is about 91986.6211902579. The cubic root of 8461538478 is about 2037.7447265129.

The spelling of 8461538478 in words is "eight billion, four hundred sixty-one million, five hundred thirty-eight thousand, four hundred seventy-eight".