818321970988 has 12 divisors (see below), whose sum is σ = 1432310780992. Its totient is φ = 409090319280.

The previous prime is 818321970839. The next prime is 818321970989. The reversal of 818321970988 is 889079123818.

It is a super-2 number, since 2×818321970988² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (818321970989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17640495 + ... + 17686822.

Almost surely, 2^818321970988 is an apocalyptic number.

It is an amenable number.

818321970988 is a deficient number, since it is larger than the sum of its proper divisors (613988810004).

818321970988 is a wasteful number, since it uses less digits than its factorization.

818321970988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35333112 (or 35333110 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 64.

The spelling of 818321970988 in words is "eight hundred eighteen billion, three hundred twenty-one million, nine hundred seventy thousand, nine hundred eighty-eight".