1311620416501 has 8 divisors (see below), whose sum is σ = 1338078252600. Its totient is φ = 1285322447040.

The previous prime is 1311620416489. The next prime is 1311620416507. The reversal of 1311620416501 is 1056140261131.

It can be written as a sum of positive squares in 4 ways, for example, as 278571784401 + 1033048632100 = 527799^2 + 1016390^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1311620416501 - 2¹³ = 1311620408309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311620416507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39950086 + ... + 39982903.

It is an arithmetic number, because the mean of its divisors is an integer number (167259781575).

Almost surely, 2^{1311620416501} is an apocalyptic number.

It is an amenable number.

1311620416501 is a deficient number, since it is larger than the sum of its proper divisors (26457836099).

1311620416501 is an equidigital number, since it uses as much as digits as its factorization.

1311620416501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79933319.

The product of its (nonzero) digits is 4320, while the sum is 31.

Adding to 1311620416501 its reverse (1056140261131), we get a palindrome (2367760677632).

The spelling of 1311620416501 in words is "one trillion, three hundred eleven billion, six hundred twenty million, four hundred sixteen thousand, five hundred one".