278322432623 has 2 divisors, whose sum is σ = 278322432624. Its totient is φ = 278322432622.

The previous prime is 278322432607. The next prime is 278322432649. The reversal of 278322432623 is 326234223872.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 278322432623 - 2⁴ = 278322432607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (278322432823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139161216311 + 139161216312.

It is an arithmetic number, because the mean of its divisors is an integer number (139161216312).

Almost surely, 2^278322432623 is an apocalyptic number.

278322432623 is a deficient number, since it is larger than the sum of its proper divisors (1).

278322432623 is an equidigital number, since it uses as much as digits as its factorization.

278322432623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 44.

The spelling of 278322432623 in words is "two hundred seventy-eight billion, three hundred twenty-two million, four hundred thirty-two thousand, six hundred twenty-three".