10399999999978 has 16 divisors (see below), whose sum is σ = 15655737646080. Its totient is φ = 5181426443536.

The previous prime is 10399999999973. The next prime is 10399999999979. The reversal of 10399999999978 is 87999999999301.

It is not an unprimeable number, because it can be changed into a prime (10399999999973) 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, 2272743 + ... + 5095621.

It is an arithmetic number, because the mean of its divisors is an integer number (978483602880).

Almost surely, 2^{10399999999978} is an apocalyptic number.

10399999999978 is a deficient number, since it is larger than the sum of its proper divisors (5255737646102).

10399999999978 is a wasteful number, since it uses less digits than its factorization.

10399999999978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2829461.

The product of its (nonzero) digits is 65086642152, while the sum is 100.

The spelling of 10399999999978 in words is "ten trillion, three hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred seventy-eight".