645435929534546 has 8 divisors (see below), whose sum is σ = 970896539895804. Its totient is φ = 321803749569280.

The previous prime is 645435929534527. The next prime is 645435929534581.

645435929534546 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 645418343857225 + 17585677321 = 25405085^2 + 132611^2 .

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

It is a super-2 number, since 2×645435929534546² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 457107598115 + ... + 457107599526.

Almost surely, 2^{645435929534546} is an apocalyptic number.

645435929534546 is a deficient number, since it is larger than the sum of its proper divisors (325460610361258).

645435929534546 is a wasteful number, since it uses less digits than its factorization.

645435929534546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914215197996.

The product of its digits is 8398080000, while the sum is 74.

The spelling of 645435929534546 in words is "six hundred forty-five trillion, four hundred thirty-five billion, nine hundred twenty-nine million, five hundred thirty-four thousand, five hundred forty-six".