1315578353491 has 2 divisors, whose sum is σ = 1315578353492. Its totient is φ = 1315578353490.

The previous prime is 1315578353417. The next prime is 1315578353497. The reversal of 1315578353491 is 1943538755131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1315578353491 - 2²³ = 1315569964883 is a prime.

It is not a weakly prime, because it can be changed into another prime (1315578353497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657789176745 + 657789176746.

It is an arithmetic number, because the mean of its divisors is an integer number (657789176746).

Almost surely, 2^{1315578353491} is an apocalyptic number.

1315578353491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315578353491 is an equidigital number, since it uses as much as digits as its factorization.

1315578353491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804000, while the sum is 55.

The spelling of 1315578353491 in words is "one trillion, three hundred fifteen billion, five hundred seventy-eight million, three hundred fifty-three thousand, four hundred ninety-one".