816075099387 has 40 divisors (see below), whose sum is σ = 1292628328992. Its totient is φ = 511316064000.

The previous prime is 816075099377. The next prime is 816075099431. The reversal of 816075099387 is 783990570618.

816075099387 is a `hidden beast` number, since 8 + 160 + 7 + 5 + 0 + 99 + 387 = 666.

It is not a de Polignac number, because 816075099387 - 2¹² = 816075095291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (816075099377) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 542562 + ... + 1387992.

Almost surely, 2^816075099387 is an apocalyptic number.

816075099387 is a deficient number, since it is larger than the sum of its proper divisors (476553229605).

816075099387 is a wasteful number, since it uses less digits than its factorization.

816075099387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846161 (or 846152 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 63.

The spelling of 816075099387 in words is "eight hundred sixteen billion, seventy-five million, ninety-nine thousand, three hundred eighty-seven".