645622004541 has 8 divisors (see below), whose sum is σ = 911466359424. Its totient is φ = 405096159680.

The previous prime is 645622004513. The next prime is 645622004549. The reversal of 645622004541 is 145400226546.

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

It is a cyclic number.

It is not a de Polignac number, because 645622004541 - 2¹⁵ = 645621971773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 645622004541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645622004549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6329627445 + ... + 6329627546.

It is an arithmetic number, because the mean of its divisors is an integer number (113933294928).

Almost surely, 2^645622004541 is an apocalyptic number.

It is an amenable number.

645622004541 is a deficient number, since it is larger than the sum of its proper divisors (265844354883).

645622004541 is a wasteful number, since it uses less digits than its factorization.

645622004541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12659255011.

The product of its (nonzero) digits is 230400, while the sum is 39.

The spelling of 645622004541 in words is "six hundred forty-five billion, six hundred twenty-two million, four thousand, five hundred forty-one".