1320404232757 has 8 divisors (see below), whose sum is σ = 1406156431896. Its totient is φ = 1235549962752.

The previous prime is 1320404232739. The next prime is 1320404232779. The reversal of 1320404232757 is 7572324040231.

It can be written as a sum of positive squares in 4 ways, for example, as 949905586161 + 370498646596 = 974631^2 + 608686^2 .

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 1320404232757 - 2³¹ = 1318256749109 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 (1320404232727) 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, 224479248 + ... + 224485129.

It is an arithmetic number, because the mean of its divisors is an integer number (175769553987).

Almost surely, 2^{1320404232757} is an apocalyptic number.

1320404232757 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1320404232757 is a deficient number, since it is larger than the sum of its proper divisors (85752199139).

1320404232757 is a wasteful number, since it uses less digits than its factorization.

1320404232757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448964567.

The product of its (nonzero) digits is 282240, while the sum is 40.

Adding to 1320404232757 its reverse (7572324040231), we get a palindrome (8892728272988).

The spelling of 1320404232757 in words is "one trillion, three hundred twenty billion, four hundred four million, two hundred thirty-two thousand, seven hundred fifty-seven".