978618400699 has 2 divisors, whose sum is σ = 978618400700. Its totient is φ = 978618400698.

The previous prime is 978618400681. The next prime is 978618400751. The reversal of 978618400699 is 996004816879.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 978618400699 - 2¹⁵ = 978618367931 is a prime.

It is not a weakly prime, because it can be changed into another prime (978618400099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489309200349 + 489309200350.

It is an arithmetic number, because the mean of its divisors is an integer number (489309200350).

Almost surely, 2^978618400699 is an apocalyptic number.

978618400699 is a deficient number, since it is larger than the sum of its proper divisors (1).

978618400699 is an equidigital number, since it uses as much as digits as its factorization.

978618400699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47029248, while the sum is 67.

The spelling of 978618400699 in words is "nine hundred seventy-eight billion, six hundred eighteen million, four hundred thousand, six hundred ninety-nine".