1356678881 has 2 divisors, whose sum is σ = 1356678882. Its totient is φ = 1356678880.

The previous prime is 1356678877. The next prime is 1356678901. The reversal of 1356678881 is 1888766531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1348064656 + 8614225 = 36716^2 + 2935^2 .

It is a cyclic number.

It is not a de Polignac number, because 1356678881 - 2² = 1356678877 is a prime.

It is a super-2 number, since 2×1356678881² = 3681155172302824322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1356678811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678339440 + 678339441.

It is an arithmetic number, because the mean of its divisors is an integer number (678339441).

Almost surely, 2^1356678881 is an apocalyptic number.

It is an amenable number.

1356678881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1356678881 is an equidigital number, since it uses as much as digits as its factorization.

1356678881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1935360, while the sum is 53.

The square root of 1356678881 is about 36833.1220642508. The cubic root of 1356678881 is about 1107.0290601500.

The spelling of 1356678881 in words is "one billion, three hundred fifty-six million, six hundred seventy-eight thousand, eight hundred eighty-one".