78298390801 has 2 divisors, whose sum is σ = 78298390802. Its totient is φ = 78298390800.

The previous prime is 78298390799. The next prime is 78298390853. The reversal of 78298390801 is 10809389287.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49381728400 + 28916662401 = 222220^2 + 170049^2 .

It is a cyclic number.

It is not a de Polignac number, because 78298390801 - 2¹ = 78298390799 is a prime.

It is a super-2 number, since 2×78298390801² (a number of 23 digits) contains 22 as substring.

Together with 78298390799, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (78298360801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39149195400 + 39149195401.

It is an arithmetic number, because the mean of its divisors is an integer number (39149195401).

Almost surely, 2^78298390801 is an apocalyptic number.

It is an amenable number.

78298390801 is a deficient number, since it is larger than the sum of its proper divisors (1).

78298390801 is an equidigital number, since it uses as much as digits as its factorization.

78298390801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1741824, while the sum is 55.

The spelling of 78298390801 in words is "seventy-eight billion, two hundred ninety-eight million, three hundred ninety thousand, eight hundred one".