8147653778 has 16 divisors (see below), whose sum is σ = 13414324896. Its totient is φ = 3680756640.

The previous prime is 8147653769. The next prime is 8147653799. The reversal of 8147653778 is 8773567418.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1132451 + ... + 1139622.

It is an arithmetic number, because the mean of its divisors is an integer number (838395306).

Almost surely, 2^8147653778 is an apocalyptic number.

8147653778 is a deficient number, since it is larger than the sum of its proper divisors (5266671118).

8147653778 is a wasteful number, since it uses less digits than its factorization.

8147653778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272249.

The product of its digits is 7902720, while the sum is 56.

The square root of 8147653778 is about 90264.3549691682. The cubic root of 8147653778 is about 2012.2295481532.

The spelling of 8147653778 in words is "eight billion, one hundred forty-seven million, six hundred fifty-three thousand, seven hundred seventy-eight".