645234404432546 has 16 divisors (see below), whose sum is σ = 969825363778464. Its totient is φ = 321959439892224.

The previous prime is 645234404432483. The next prime is 645234404432587.

645234404432546 is nontrivially palindromic in base 10.

645234404432546 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×645234404432546³ (a number of 45 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 645234404432491 and 645234404432500.

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, 30940436 + ... + 47410751.

It is an arithmetic number, because the mean of its divisors is an integer number (60614085236154).

Almost surely, 2^{645234404432546} is an apocalyptic number.

645234404432546 is a deficient number, since it is larger than the sum of its proper divisors (324590959345918).

645234404432546 is a wasteful number, since it uses less digits than its factorization.

645234404432546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78359585.

The product of its (nonzero) digits is 132710400, while the sum is 56.

It can be divided in two parts, 64523440 and 4432546, that added together give a palindrome (68955986).

The spelling of 645234404432546 in words is "six hundred forty-five trillion, two hundred thirty-four billion, four hundred four million, four hundred thirty-two thousand, five hundred forty-six".