840374496999 has 18 divisors (see below), whose sum is σ = 1257175388456. Its totient is φ = 540930705840.

The previous prime is 840374496953. The next prime is 840374497051. The reversal of 840374496999 is 999694473048.

840374496999 is a `hidden beast` number, since 8 + 4 + 0 + 37 + 449 + 69 + 99 = 666.

It is not a de Polignac number, because 840374496999 - 2¹¹ = 840374494951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840374495999) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 55506667 + ... + 55521804.

Almost surely, 2^840374496999 is an apocalyptic number.

840374496999 is a deficient number, since it is larger than the sum of its proper divisors (416800891457).

840374496999 is a wasteful number, since it uses less digits than its factorization.

840374496999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111028535 (or 111028503 counting only the distinct ones).

The product of its (nonzero) digits is 423263232, while the sum is 72.

The spelling of 840374496999 in words is "eight hundred forty billion, three hundred seventy-four million, four hundred ninety-six thousand, nine hundred ninety-nine".