1645420246045 has 8 divisors (see below), whose sum is σ = 2003974509024. Its totient is φ = 1296689387664.

The previous prime is 1645420246033. The next prime is 1645420246049. The reversal of 1645420246045 is 5406420245461.

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 1645420246045 - 2⁵ = 1645420246013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1645420245992 and 1645420246010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645420246049) 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, 2455850779 + ... + 2455851448.

It is an arithmetic number, because the mean of its divisors is an integer number (250496813628).

Almost surely, 2^{1645420246045} is an apocalyptic number.

It is an amenable number.

1645420246045 is a deficient number, since it is larger than the sum of its proper divisors (358554262979).

1645420246045 is an equidigital number, since it uses as much as digits as its factorization.

1645420246045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4911702299.

The product of its (nonzero) digits is 921600, while the sum is 43.

The spelling of 1645420246045 in words is "one trillion, six hundred forty-five billion, four hundred twenty million, two hundred forty-six thousand, forty-five".