278178481153 has 2 divisors, whose sum is σ = 278178481154. Its totient is φ = 278178481152.

The previous prime is 278178481033. The next prime is 278178481169. The reversal of 278178481153 is 351184871872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 277172766784 + 1005714369 = 526472^2 + 31713^2 .

It is a cyclic number.

It is not a de Polignac number, because 278178481153 - 2⁹ = 278178480641 is a prime.

It is a super-3 number, since 3×278178481153³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 278178481094 and 278178481103.

It is not a weakly prime, because it can be changed into another prime (278178481193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139089240576 + 139089240577.

It is an arithmetic number, because the mean of its divisors is an integer number (139089240577).

Almost surely, 2^278178481153 is an apocalyptic number.

It is an amenable number.

278178481153 is a deficient number, since it is larger than the sum of its proper divisors (1).

278178481153 is an equidigital number, since it uses as much as digits as its factorization.

278178481153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3010560, while the sum is 55.

The spelling of 278178481153 in words is "two hundred seventy-eight billion, one hundred seventy-eight million, four hundred eighty-one thousand, one hundred fifty-three".