278798652001 has 4 divisors (see below), whose sum is σ = 278801830404. Its totient is φ = 278795473600.

The previous prime is 278798651981. The next prime is 278798652017. The reversal of 278798652001 is 100256897872.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 163486792225 + 115311859776 = 404335^2 + 339576^2 .

It is a cyclic number.

It is not a de Polignac number, because 278798652001 - 2⁵ = 278798651969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (278798652061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1453780 + ... + 1634341.

It is an arithmetic number, because the mean of its divisors is an integer number (69700457601).

Almost surely, 2^278798652001 is an apocalyptic number.

It is an amenable number.

278798652001 is a deficient number, since it is larger than the sum of its proper divisors (3178403).

278798652001 is an equidigital number, since it uses as much as digits as its factorization.

278798652001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3178402.

The product of its (nonzero) digits is 3386880, while the sum is 55.

The spelling of 278798652001 in words is "two hundred seventy-eight billion, seven hundred ninety-eight million, six hundred fifty-two thousand, one".