645423242324546 has 16 divisors (see below), whose sum is σ = 1106440600728960. Its totient is φ = 276609771810240.

The previous prime is 645423242324533. The next prime is 645423242324617.

It is a happy number.

645423242324546 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×645423242324546² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 645423242324491 and 645423242324500.

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, 6521450 + ... + 36515418.

It is an arithmetic number, because the mean of its divisors is an integer number (69152537545560).

Almost surely, 2^{645423242324546} is an apocalyptic number.

645423242324546 is a deficient number, since it is larger than the sum of its proper divisors (461017358404414).

645423242324546 is a wasteful number, since it uses less digits than its factorization.

645423242324546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31531009.

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

The spelling of 645423242324546 in words is "six hundred forty-five trillion, four hundred twenty-three billion, two hundred forty-two million, three hundred twenty-four thousand, five hundred forty-six".