278538115014623 has 2 divisors, whose sum is σ = 278538115014624. Its totient is φ = 278538115014622.

The previous prime is 278538115014587. The next prime is 278538115014631. The reversal of 278538115014623 is 326410511835872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 278538115014623 - 2⁶ = 278538115014559 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (278531115014623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139269057507311 + 139269057507312.

It is an arithmetic number, because the mean of its divisors is an integer number (139269057507312).

Almost surely, 2^{278538115014623} is an apocalyptic number.

278538115014623 is a deficient number, since it is larger than the sum of its proper divisors (1).

278538115014623 is an equidigital number, since it uses as much as digits as its factorization.

278538115014623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9676800, while the sum is 56.

The spelling of 278538115014623 in words is "two hundred seventy-eight trillion, five hundred thirty-eight billion, one hundred fifteen million, fourteen thousand, six hundred twenty-three".