8223960901978 has 12 divisors (see below), whose sum is σ = 12356502283710. Its totient is φ = 4105138192800.

The previous prime is 8223960901967. The next prime is 8223960901991. The reversal of 8223960901978 is 8791090693228.

It can be written as a sum of positive squares in 3 ways, for example, as 7646015810449 + 577945091529 = 2765143^2 + 760227^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4969693 + ... + 6414496.

Almost surely, 2^{8223960901978} is an apocalyptic number.

8223960901978 is a deficient number, since it is larger than the sum of its proper divisors (4132541381732).

8223960901978 is an equidigital number, since it uses as much as digits as its factorization.

8223960901978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11385393 (or 11384792 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 64.

The spelling of 8223960901978 in words is "eight trillion, two hundred twenty-three billion, nine hundred sixty million, nine hundred one thousand, nine hundred seventy-eight".