999999639993275 has 12 divisors (see below), whose sum is σ = 1240000967680872. Its totient is φ = 799998799679040.

The previous prime is 999999639993269. The next prime is 999999639993307. The reversal of 999999639993275 is 572399936999999.

It is not a de Polignac number, because 999999639993275 - 2²⁴ = 999999623216059 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2 + ... + 44721351.

It is an arithmetic number, because the mean of its divisors is an integer number (103333413973406).

Almost surely, 2^{999999639993275} is an apocalyptic number.

999999639993275 is a deficient number, since it is larger than the sum of its proper divisors (240001327687597).

999999639993275 is a wasteful number, since it uses less digits than its factorization.

999999639993275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45615790 (or 45615785 counting only the distinct ones).

The product of its digits is 1464449448420, while the sum is 107.

The spelling of 999999639993275 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, six hundred thirty-nine million, nine hundred ninety-three thousand, two hundred seventy-five".