1301878778266 has 24 divisors (see below), whose sum is σ = 2239811576352. Its totient is φ = 566034249000.

The previous prime is 1301878778159. The next prime is 1301878778273. The reversal of 1301878778266 is 6628778781031.

It is a junction number, because it is equal to n+sod(n) for n = 1301878778198 and 1301878778207.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116943660 + ... + 116954791.

It is an arithmetic number, because the mean of its divisors is an integer number (93325482348).

Almost surely, 2^{1301878778266} is an apocalyptic number.

1301878778266 is a deficient number, since it is larger than the sum of its proper divisors (937932798086).

1301878778266 is a wasteful number, since it uses less digits than its factorization.

1301878778266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233898498 (or 233898487 counting only the distinct ones).

The product of its (nonzero) digits is 37933056, while the sum is 64.

The spelling of 1301878778266 in words is "one trillion, three hundred one billion, eight hundred seventy-eight million, seven hundred seventy-eight thousand, two hundred sixty-six".