278626126451 has 2 divisors, whose sum is σ = 278626126452. Its totient is φ = 278626126450.

The previous prime is 278626126417. The next prime is 278626126463. The reversal of 278626126451 is 154621626872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 278626126451 - 2¹⁴ = 278626110067 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 278626126451.

It is not a weakly prime, because it can be changed into another prime (278626126951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139313063225 + 139313063226.

It is an arithmetic number, because the mean of its divisors is an integer number (139313063226).

Almost surely, 2^278626126451 is an apocalyptic number.

278626126451 is a deficient number, since it is larger than the sum of its proper divisors (1).

278626126451 is an equidigital number, since it uses as much as digits as its factorization.

278626126451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1935360, while the sum is 50.

The spelling of 278626126451 in words is "two hundred seventy-eight billion, six hundred twenty-six million, one hundred twenty-six thousand, four hundred fifty-one".