4278374272961 has 2 divisors, whose sum is σ = 4278374272962. Its totient is φ = 4278374272960.

The previous prime is 4278374272897. The next prime is 4278374272979. The reversal of 4278374272961 is 1692724738724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4155624946225 + 122749326736 = 2038535^2 + 350356^2 .

It is a cyclic number.

It is not a de Polignac number, because 4278374272961 - 2⁶ = 4278374272897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4278374272894 and 4278374272903.

It is not a weakly prime, because it can be changed into another prime (4278374212961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2139187136480 + 2139187136481.

It is an arithmetic number, because the mean of its divisors is an integer number (2139187136481).

Almost surely, 2^{4278374272961} is an apocalyptic number.

It is an amenable number.

4278374272961 is a deficient number, since it is larger than the sum of its proper divisors (1).

4278374272961 is an equidigital number, since it uses as much as digits as its factorization.

4278374272961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56899584, while the sum is 62.

The spelling of 4278374272961 in words is "four trillion, two hundred seventy-eight billion, three hundred seventy-four million, two hundred seventy-two thousand, nine hundred sixty-one".