278776406041 has 24 divisors (see below), whose sum is σ = 329634777960. Its totient is φ = 235041472512.

The previous prime is 278776406039. The next prime is 278776406087. The reversal of 278776406041 is 140604677872.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2621952025 + 276154454016 = 51205^2 + 525504^2 .

It is not a de Polignac number, because 278776406041 - 2¹ = 278776406039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 278776406041.

It is not an unprimeable number, because it can be changed into a prime (278776400041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 676065 + ... + 1007281.

It is an arithmetic number, because the mean of its divisors is an integer number (13734782415).

Almost surely, 2^278776406041 is an apocalyptic number.

It is an amenable number.

278776406041 is a deficient number, since it is larger than the sum of its proper divisors (50858371919).

278776406041 is a wasteful number, since it uses less digits than its factorization.

278776406041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331513 (or 331506 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 52.

The spelling of 278776406041 in words is "two hundred seventy-eight billion, seven hundred seventy-six million, four hundred six thousand, forty-one".