646306515445 has 8 divisors (see below), whose sum is σ = 775573451136. Its totient is φ = 517041457296.

The previous prime is 646306515433. The next prime is 646306515473. The reversal of 646306515445 is 544515603646.

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 646306515445 - 2²⁷ = 646172297717 is a prime.

It is a super-2 number, since 2×646306515445² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452544 + ... + 1223686.

It is an arithmetic number, because the mean of its divisors is an integer number (96946681392).

Almost surely, 2^646306515445 is an apocalyptic number.

It is an amenable number.

646306515445 is a deficient number, since it is larger than the sum of its proper divisors (129266935691).

646306515445 is a wasteful number, since it uses less digits than its factorization.

646306515445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938771.

The product of its (nonzero) digits is 5184000, while the sum is 49.

The spelling of 646306515445 in words is "six hundred forty-six billion, three hundred six million, five hundred fifteen thousand, four hundred forty-five".