645251152546 has 32 divisors (see below), whose sum is σ = 1299526800768. Its totient is φ = 232058355840.

The previous prime is 645251152531. The next prime is 645251152603.

645251152546 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 645251152496 and 645251152505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161149635 + ... + 161153638.

It is an arithmetic number, because the mean of its divisors is an integer number (40610212524).

Almost surely, 2^645251152546 is an apocalyptic number.

645251152546 is an abundant number, since it is smaller than the sum of its proper divisors (654275648222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645251152546 is a wasteful number, since it uses less digits than its factorization.

645251152546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322303306.

The product of its digits is 1440000, while the sum is 46.

It can be divided in two parts, 645251 and 152546, that added together give a palindrome (797797).

The spelling of 645251152546 in words is "six hundred forty-five billion, two hundred fifty-one million, one hundred fifty-two thousand, five hundred forty-six".