3398726768978 has 16 divisors (see below), whose sum is σ = 5599732893120. Its totient is φ = 1539926544816.

The previous prime is 3398726768951. The next prime is 3398726768993. The reversal of 3398726768978 is 8798676278933.

It is a junction number, because it is equal to n+sod(n) for n = 3398726768896 and 3398726768905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1944350825 + ... + 1944352572.

It is an arithmetic number, because the mean of its divisors is an integer number (349983305820).

Almost surely, 2^{3398726768978} is an apocalyptic number.

3398726768978 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3398726768978 is a deficient number, since it is larger than the sum of its proper divisors (2201006124142).

3398726768978 is a wasteful number, since it uses less digits than its factorization.

3398726768978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3888703441.

The product of its digits is 9217732608, while the sum is 83.

The spelling of 3398726768978 in words is "three trillion, three hundred ninety-eight billion, seven hundred twenty-six million, seven hundred sixty-eight thousand, nine hundred seventy-eight".