1315323640445 has 16 divisors (see below), whose sum is σ = 1592848734768. Its totient is φ = 1042647068160.

The previous prime is 1315323640403. The next prime is 1315323640451. The reversal of 1315323640445 is 5440463235131.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 9071229049 + 1306252411396 = 95243^2 + 1142914^2 .

It is not a de Polignac number, because 1315323640445 - 2¹⁴ = 1315323624061 is a prime.

It is a super-2 number, since 2×1315323640445² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1404074 + ... + 2145243.

It is an arithmetic number, because the mean of its divisors is an integer number (99553045923).

Almost surely, 2^{1315323640445} is an apocalyptic number.

It is an amenable number.

1315323640445 is a deficient number, since it is larger than the sum of its proper divisors (277525094323).

1315323640445 is a wasteful number, since it uses less digits than its factorization.

1315323640445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3550000.

The product of its (nonzero) digits is 518400, while the sum is 41.

Adding to 1315323640445 its reverse (5440463235131), we get a palindrome (6755786875576).

The spelling of 1315323640445 in words is "one trillion, three hundred fifteen billion, three hundred twenty-three million, six hundred forty thousand, four hundred forty-five".