978774451199 has 2 divisors, whose sum is σ = 978774451200. Its totient is φ = 978774451198.

The previous prime is 978774451169. The next prime is 978774451217. The reversal of 978774451199 is 991154477879.

It is a strong prime.

It is an emirp because it is prime and its reverse (991154477879) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-978774451199 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978774451169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489387225599 + 489387225600.

It is an arithmetic number, because the mean of its divisors is an integer number (489387225600).

Almost surely, 2^978774451199 is an apocalyptic number.

978774451199 is a deficient number, since it is larger than the sum of its proper divisors (1).

978774451199 is an equidigital number, since it uses as much as digits as its factorization.

978774451199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 160030080, while the sum is 71.

The spelling of 978774451199 in words is "nine hundred seventy-eight billion, seven hundred seventy-four million, four hundred fifty-one thousand, one hundred ninety-nine".