7843156164 has 18 divisors (see below), whose sum is σ = 19825755950. Its totient is φ = 2614385376.

The previous prime is 7843156117. The next prime is 7843156201. The reversal of 7843156164 is 4616513487.

7843156164 is a `hidden beast` number, since 7 + 8 + 431 + 56 + 164 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4127034564 + 3716121600 = 64242^2 + 60960^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×7843156164² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 108932689 + ... + 108932760.

Almost surely, 2^7843156164 is an apocalyptic number.

It is an amenable number.

7843156164 is an abundant number, since it is smaller than the sum of its proper divisors (11982599786).

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

7843156164 is a wasteful number, since it uses less digits than its factorization.

7843156164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217865459 (or 217865454 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 7843156164 is about 88561.5953108344. The cubic root of 7843156164 is about 1986.8433210155.

The spelling of 7843156164 in words is "seven billion, eight hundred forty-three million, one hundred fifty-six thousand, one hundred sixty-four".