999999996278 has 16 divisors (see below), whose sum is σ = 1520634787056. Its totient is φ = 493122516480.

The previous prime is 999999996277. The next prime is 999999996311. The reversal of 999999996278 is 872699999999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999999996277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2495750 + ... + 2868582.

It is an arithmetic number, because the mean of its divisors is an integer number (95039674191).

Almost surely, 2^999999996278 is an apocalyptic number.

999999996278 is a deficient number, since it is larger than the sum of its proper divisors (520634790778).

999999996278 is a wasteful number, since it uses less digits than its factorization.

999999996278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391279.

The product of its digits is 28927396512, while the sum is 95.

The spelling of 999999996278 in words is "nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-six thousand, two hundred seventy-eight".