645434434546 has 16 divisors (see below), whose sum is σ = 1066622525568. Its totient is φ = 290474542000.

The previous prime is 645434434501. The next prime is 645434434573.

It is a happy number.

645434434546 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×645434434546² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 645434434493 and 645434434502.

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, 145235050 + ... + 145239493.

It is an arithmetic number, because the mean of its divisors is an integer number (66663907848).

Almost surely, 2^645434434546 is an apocalyptic number.

645434434546 is a deficient number, since it is larger than the sum of its proper divisors (421188091022).

645434434546 is a wasteful number, since it uses less digits than its factorization.

645434434546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290474657.

The product of its digits is 33177600, while the sum is 52.

The spelling of 645434434546 in words is "six hundred forty-five billion, four hundred thirty-four million, four hundred thirty-four thousand, five hundred forty-six".