645053041003 has 8 divisors (see below), whose sum is σ = 760984232960. Its totient is φ = 535067038440.

The previous prime is 645053040991. The next prime is 645053041063. The reversal of 645053041003 is 300140350546.

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 645053041003 - 2²¹ = 645050943851 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (645053041063) 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, 1486297113 + ... + 1486297546.

It is an arithmetic number, because the mean of its divisors is an integer number (95123029120).

Almost surely, 2^645053041003 is an apocalyptic number.

645053041003 is a deficient number, since it is larger than the sum of its proper divisors (115931191957).

645053041003 is a wasteful number, since it uses less digits than its factorization.

645053041003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2972594697.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 645053041003 its reverse (300140350546), we get a palindrome (945193391549).

The spelling of 645053041003 in words is "six hundred forty-five billion, fifty-three million, forty-one thousand, three".