1320345742457 has 32 divisors (see below), whose sum is σ = 1571310316800. Its totient is φ = 1085506329600.

The previous prime is 1320345742453. The next prime is 1320345742511. The reversal of 1320345742457 is 7542475430231.

It is not a de Polignac number, because 1320345742457 - 2² = 1320345742453 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1320345742453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18846269 + ... + 18916197.

It is an arithmetic number, because the mean of its divisors is an integer number (49103447400).

Almost surely, 2^{1320345742457} is an apocalyptic number.

It is an amenable number.

1320345742457 is a deficient number, since it is larger than the sum of its proper divisors (250964574343).

1320345742457 is a wasteful number, since it uses less digits than its factorization.

1320345742457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70577.

The product of its (nonzero) digits is 2822400, while the sum is 47.

The spelling of 1320345742457 in words is "one trillion, three hundred twenty billion, three hundred forty-five million, seven hundred forty-two thousand, four hundred fifty-seven".