678245909542803 has 24 divisors (see below), whose sum is σ = 1121584498820448. Its totient is φ = 386897394281472.

The previous prime is 678245909542769. The next prime is 678245909542807. The reversal of 678245909542803 is 308245909542876.

678245909542803 is a `hidden beast` number, since 6 + 7 + 8 + 2 + 4 + 590 + 9 + 5 + 4 + 28 + 0 + 3 = 666.

678245909542803 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 678245909542803 - 2¹⁶ = 678245909477267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (678245909542807) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9329086776 + ... + 9329159477.

It is an arithmetic number, because the mean of its divisors is an integer number (46732687450852).

Almost surely, 2^{678245909542803} is an apocalyptic number.

678245909542803 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

678245909542803 is a deficient number, since it is larger than the sum of its proper divisors (443338589277645).

678245909542803 is a wasteful number, since it uses less digits than its factorization.

678245909542803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18658246843 (or 18658246840 counting only the distinct ones).

The product of its (nonzero) digits is 1045094400, while the sum is 72.

The spelling of 678245909542803 in words is "six hundred seventy-eight trillion, two hundred forty-five billion, nine hundred nine million, five hundred forty-two thousand, eight hundred three".