1316540261505 has 32 divisors (see below), whose sum is σ = 2512056950784. Its totient is φ = 575679715776.

The previous prime is 1316540261503. The next prime is 1316540261513. The reversal of 1316540261505 is 5051620456131.

It is not a de Polignac number, because 1316540261505 - 2¹ = 1316540261503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1316540261503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 272573209 + ... + 272578038.

It is an arithmetic number, because the mean of its divisors is an integer number (78501779712).

Almost surely, 2^{1316540261505} is an apocalyptic number.

1316540261505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1316540261505 is a deficient number, since it is larger than the sum of its proper divisors (1195516689279).

1316540261505 is a wasteful number, since it uses less digits than its factorization.

1316540261505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545151285.

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 1316540261505 in words is "one trillion, three hundred sixteen billion, five hundred forty million, two hundred sixty-one thousand, five hundred five".