8461947555 has 32 divisors (see below), whose sum is σ = 15562209600. Its totient is φ = 4357414656.

The previous prime is 8461947553. The next prime is 8461947563. The reversal of 8461947555 is 5557491648.

It is a happy number.

8461947555 is a `hidden beast` number, since 8 + 46 + 1 + 9 + 47 + 555 = 666.

It is not a de Polignac number, because 8461947555 - 2¹ = 8461947553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8461947551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1076794 + ... + 1084623.

It is an arithmetic number, because the mean of its divisors is an integer number (486319050).

Almost surely, 2^8461947555 is an apocalyptic number.

8461947555 is a deficient number, since it is larger than the sum of its proper divisors (7100262045).

8461947555 is a wasteful number, since it uses less digits than its factorization.

8461947555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2161460 (or 2161454 counting only the distinct ones).

The product of its digits is 6048000, while the sum is 54.

The square root of 8461947555 is about 91988.8447313042. The cubic root of 8461947555 is about 2037.7775645549. Note that the first 3 decimals are identical.

The spelling of 8461947555 in words is "eight billion, four hundred sixty-one million, nine hundred forty-seven thousand, five hundred fifty-five".