1645753450063 has 4 divisors (see below), whose sum is σ = 1646809098480. Its totient is φ = 1644697801648.

The previous prime is 1645753449931. The next prime is 1645753450123. The reversal of 1645753450063 is 3600543575461.

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 1645753450063 - 2⁹ = 1645753449551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1645753449989 and 1645753450016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645753451063) 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, 527821870 + ... + 527824987.

It is an arithmetic number, because the mean of its divisors is an integer number (411702274620).

Almost surely, 2^{1645753450063} is an apocalyptic number.

1645753450063 is a deficient number, since it is larger than the sum of its proper divisors (1055648417).

1645753450063 is a wasteful number, since it uses less digits than its factorization.

1645753450063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055648416.

The product of its (nonzero) digits is 4536000, while the sum is 49.

The spelling of 1645753450063 in words is "one trillion, six hundred forty-five billion, seven hundred fifty-three million, four hundred fifty thousand, sixty-three".