278916979763 has 2 divisors, whose sum is σ = 278916979764. Its totient is φ = 278916979762.

The previous prime is 278916979753. The next prime is 278916979793. The reversal of 278916979763 is 367979619872.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 278916979763 - 2¹⁴ = 278916963379 is a prime.

It is a super-2 number, since 2×278916979763² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (278916979753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139458489881 + 139458489882.

It is an arithmetic number, because the mean of its divisors is an integer number (139458489882).

Almost surely, 2^278916979763 is an apocalyptic number.

278916979763 is a deficient number, since it is larger than the sum of its proper divisors (1).

278916979763 is an equidigital number, since it uses as much as digits as its factorization.

278916979763 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432081216, while the sum is 74.

The spelling of 278916979763 in words is "two hundred seventy-eight billion, nine hundred sixteen million, nine hundred seventy-nine thousand, seven hundred sixty-three".