1320604562603 has 4 divisors (see below), whose sum is σ = 1320620248200. Its totient is φ = 1320588877008.

The previous prime is 1320604562587. The next prime is 1320604562639. The reversal of 1320604562603 is 3062654060231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1320604562603 - 2⁴ = 1320604562587 is a prime.

It is a super-2 number, since 2×1320604562603² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320604561603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7715825 + ... + 7885122.

It is an arithmetic number, because the mean of its divisors is an integer number (330155062050).

Almost surely, 2^{1320604562603} is an apocalyptic number.

1320604562603 is a deficient number, since it is larger than the sum of its proper divisors (15685597).

1320604562603 is an equidigital number, since it uses as much as digits as its factorization.

1320604562603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15685596.

The product of its (nonzero) digits is 155520, while the sum is 38.

The spelling of 1320604562603 in words is "one trillion, three hundred twenty billion, six hundred four million, five hundred sixty-two thousand, six hundred three".