645763361083 has 4 divisors (see below), whose sum is σ = 645873734968. Its totient is φ = 645652987200.

The previous prime is 645763361057. The next prime is 645763361101. The reversal of 645763361083 is 380163367546.

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 645763361083 - 2⁵ = 645763361051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 645763361083.

It is not an unprimeable number, because it can be changed into a prime (645763661083) 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, 55178166 + ... + 55189867.

It is an arithmetic number, because the mean of its divisors is an integer number (161468433742).

Almost surely, 2^645763361083 is an apocalyptic number.

645763361083 is a deficient number, since it is larger than the sum of its proper divisors (110373885).

645763361083 is a wasteful number, since it uses less digits than its factorization.

645763361083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110373884.

The product of its (nonzero) digits is 6531840, while the sum is 52.

The spelling of 645763361083 in words is "six hundred forty-five billion, seven hundred sixty-three million, three hundred sixty-one thousand, eighty-three".