645131102063 has 8 divisors (see below), whose sum is σ = 737338248480. Its totient is φ = 552935345760.

The previous prime is 645131102003. The next prime is 645131102071. The reversal of 645131102063 is 360201131546.

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

It is not a de Polignac number, because 645131102063 - 2¹² = 645131097967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645131102003) 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, 2725808 + ... + 2953013.

It is an arithmetic number, because the mean of its divisors is an integer number (92167281060).

Almost surely, 2^645131102063 is an apocalyptic number.

645131102063 is a deficient number, since it is larger than the sum of its proper divisors (92207146417).

645131102063 is a wasteful number, since it uses less digits than its factorization.

645131102063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5695057.

The product of its (nonzero) digits is 12960, while the sum is 32.

The spelling of 645131102063 in words is "six hundred forty-five billion, one hundred thirty-one million, one hundred two thousand, sixty-three".