1320696645 has 8 divisors (see below), whose sum is σ = 2113114656. Its totient is φ = 704371536.

The previous prime is 1320696607. The next prime is 1320696661. The reversal of 1320696645 is 5466960231.

1320696645 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1320696645 - 2¹⁸ = 1320434501 is a prime.

It is a super-2 number, since 2×1320696645² = 3488479256228512050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1320696597 and 1320696606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44023207 + ... + 44023236.

It is an arithmetic number, because the mean of its divisors is an integer number (264139332).

Almost surely, 2^1320696645 is an apocalyptic number.

1320696645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1320696645 is a deficient number, since it is larger than the sum of its proper divisors (792418011).

1320696645 is an equidigital number, since it uses as much as digits as its factorization.

1320696645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88046451.

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 1320696645 is about 36341.3902458340. The cubic root of 1320696645 is about 1097.1542544801.

The spelling of 1320696645 in words is "one billion, three hundred twenty million, six hundred ninety-six thousand, six hundred forty-five".