1356031515491 has 2 divisors, whose sum is σ = 1356031515492. Its totient is φ = 1356031515490.

The previous prime is 1356031515401. The next prime is 1356031515493. The reversal of 1356031515491 is 1945151306531.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1356031515491 - 2¹⁸ = 1356031253347 is a prime.

It is a Sophie Germain prime.

Together with 1356031515493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1356031515493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678015757745 + 678015757746.

It is an arithmetic number, because the mean of its divisors is an integer number (678015757746).

Almost surely, 2^{1356031515491} is an apocalyptic number.

1356031515491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1356031515491 is an equidigital number, since it uses as much as digits as its factorization.

1356031515491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243000, while the sum is 44.

The spelling of 1356031515491 in words is "one trillion, three hundred fifty-six billion, thirty-one million, five hundred fifteen thousand, four hundred ninety-one".