278033201813 has 2 divisors, whose sum is σ = 278033201814. Its totient is φ = 278033201812.

The previous prime is 278033201767. The next prime is 278033201839. The reversal of 278033201813 is 318102330872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 272476692049 + 5556509764 = 521993^2 + 74542^2 .

It is a cyclic number.

It is not a de Polignac number, because 278033201813 - 2²⁴ = 278016424597 is a prime.

It is a super-2 number, since 2×278033201813² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (278033201843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139016600906 + 139016600907.

It is an arithmetic number, because the mean of its divisors is an integer number (139016600907).

Almost surely, 2^278033201813 is an apocalyptic number.

It is an amenable number.

278033201813 is a deficient number, since it is larger than the sum of its proper divisors (1).

278033201813 is an equidigital number, since it uses as much as digits as its factorization.

278033201813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 278033201813 in words is "two hundred seventy-eight billion, thirty-three million, two hundred one thousand, eight hundred thirteen".