278675546446081 has 16 divisors (see below), whose sum is σ = 290557392008400. Its totient is φ = 266953491302400.

The previous prime is 278675546446069. The next prime is 278675546446133. The reversal of 278675546446081 is 180644645576872.

It can be written as a sum of positive squares in 8 ways, for example, as 12893736916225 + 265781809529856 = 3590785^2 + 16302816^2 .

It is a cyclic number.

It is not a de Polignac number, because 278675546446081 - 2¹¹ = 278675546444033 is a prime.

It is a super-2 number, since 2×278675546446081² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 278675546445995 and 278675546446013.

It is not an unprimeable number, because it can be changed into a prime (278675546446061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72234180 + ... + 75994261.

It is an arithmetic number, because the mean of its divisors is an integer number (18159837000525).

Almost surely, 2^{278675546446081} is an apocalyptic number.

It is an amenable number.

278675546446081 is a deficient number, since it is larger than the sum of its proper divisors (11881845562319).

278675546446081 is a wasteful number, since it uses less digits than its factorization.

278675546446081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148228980.

The product of its (nonzero) digits is 2167603200, while the sum is 73.

The spelling of 278675546446081 in words is "two hundred seventy-eight trillion, six hundred seventy-five billion, five hundred forty-six million, four hundred forty-six thousand, eighty-one".