6818535040 has 64 divisors (see below), whose sum is σ = 16310565000. Its totient is φ = 2725740544.

The previous prime is 6818535037. The next prime is 6818535091. The reversal of 6818535040 is 405358186.

It can be written as a sum of positive squares in 4 ways, for example, as 4820802624 + 1997732416 = 69432^2 + 44696^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 6818534984 and 6818535002.

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, 1975236 + ... + 1978684.

Almost surely, 2^6818535040 is an apocalyptic number.

It is an amenable number.

6818535040 is an abundant number, since it is smaller than the sum of its proper divisors (9492029960).

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

6818535040 is a wasteful number, since it uses less digits than its factorization.

6818535040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6557 (or 6545 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 6818535040 is about 82574.4212211021. The cubic root of 6818535040 is about 1896.2562514541.

The spelling of 6818535040 in words is "six billion, eight hundred eighteen million, five hundred thirty-five thousand, forty".