645415113613 has 8 divisors (see below), whose sum is σ = 656010801560. Its totient is φ = 634819913280.

The previous prime is 645415113547. The next prime is 645415113619. The reversal of 645415113613 is 316311514546.

It is a happy number.

645415113613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 988284969 + 644426828644 = 31437^2 + 802762^2 .

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 645415113613 - 2²⁵ = 645381559181 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 (645415113619) 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, 3353431 + ... + 3540667.

It is an arithmetic number, because the mean of its divisors is an integer number (82001350195).

Almost surely, 2^645415113613 is an apocalyptic number.

It is an amenable number.

645415113613 is a deficient number, since it is larger than the sum of its proper divisors (10595687947).

645415113613 is a wasteful number, since it uses less digits than its factorization.

645415113613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243807.

The product of its digits is 129600, while the sum is 40.

The spelling of 645415113613 in words is "six hundred forty-five billion, four hundred fifteen million, one hundred thirteen thousand, six hundred thirteen".