645452332413 has 8 divisors (see below), whose sum is σ = 983546411328. Its totient is φ = 368829904224.

The previous prime is 645452332363. The next prime is 645452332433. The reversal of 645452332413 is 314233254546.

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

It is not a de Polignac number, because 645452332413 - 2⁸ = 645452332157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645452332433) 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, 15367912656 + ... + 15367912697.

It is an arithmetic number, because the mean of its divisors is an integer number (122943301416).

Almost surely, 2^645452332413 is an apocalyptic number.

It is an amenable number.

645452332413 is a deficient number, since it is larger than the sum of its proper divisors (338094078915).

645452332413 is a wasteful number, since it uses less digits than its factorization.

645452332413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30735825363.

The product of its digits is 1036800, while the sum is 42.

Adding to 645452332413 its reverse (314233254546), we get a palindrome (959685586959).

The spelling of 645452332413 in words is "six hundred forty-five billion, four hundred fifty-two million, three hundred thirty-two thousand, four hundred thirteen".