645623527454 has 8 divisors (see below), whose sum is σ = 968548889568. Its totient is φ = 322773897600.

The previous prime is 645623527447. The next prime is 645623527457. The reversal of 645623527454 is 454725326546.

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

It is a junction number, because it is equal to n+sod(n) for n = 645623527396 and 645623527405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645623527457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18911747 + ... + 18945854.

It is an arithmetic number, because the mean of its divisors is an integer number (121068611196).

Almost surely, 2^645623527454 is an apocalyptic number.

645623527454 is a deficient number, since it is larger than the sum of its proper divisors (322925362114).

645623527454 is a wasteful number, since it uses less digits than its factorization.

645623527454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37866130.

The product of its digits is 24192000, while the sum is 53.

The spelling of 645623527454 in words is "six hundred forty-five billion, six hundred twenty-three million, five hundred twenty-seven thousand, four hundred fifty-four".