7918644834 has 32 divisors (see below), whose sum is σ = 17600135040. Its totient is φ = 2639076336.

The previous prime is 7918644817. The next prime is 7918644847. The reversal of 7918644834 is 4384468197.

7918644834 is a `hidden beast` number, since 7 + 91 + 86 + 448 + 34 = 666.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 427632 + ... + 445764.

It is an arithmetic number, because the mean of its divisors is an integer number (550004220).

Almost surely, 2^7918644834 is an apocalyptic number.

7918644834 is an abundant number, since it is smaller than the sum of its proper divisors (9681490206).

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

7918644834 is a wasteful number, since it uses less digits than its factorization.

7918644834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26231 (or 26225 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The square root of 7918644834 is about 88986.7677466712. The cubic root of 7918644834 is about 1993.1972906400.

The spelling of 7918644834 in words is "seven billion, nine hundred eighteen million, six hundred forty-four thousand, eight hundred thirty-four".