1645636020562 has 8 divisors (see below), whose sum is σ = 2468543064192. Its totient is φ = 822788332500.

The previous prime is 1645636020533. The next prime is 1645636020563. The reversal of 1645636020562 is 2650206365461.

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

It is a super-2 number, since 2×1645636020562² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1645636020563) 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 3 ways as a sum of consecutive naturals, for example, 14769514 + ... + 14880517.

It is an arithmetic number, because the mean of its divisors is an integer number (308567883024).

Almost surely, 2^{1645636020562} is an apocalyptic number.

1645636020562 is a deficient number, since it is larger than the sum of its proper divisors (822907043630).

1645636020562 is a wasteful number, since it uses less digits than its factorization.

1645636020562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29677784.

The product of its (nonzero) digits is 1555200, while the sum is 46.

The spelling of 1645636020562 in words is "one trillion, six hundred forty-five billion, six hundred thirty-six million, twenty thousand, five hundred sixty-two".