645466774465 has 8 divisors (see below), whose sum is σ = 774564960960. Its totient is φ = 516370198512.

The previous prime is 645466774399. The next prime is 645466774471. The reversal of 645466774465 is 564477664546.

It is a happy number.

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 645466774465 - 2¹¹ = 645466772417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 645466774397 and 645466774406.

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, 812422 + ... + 1396768.

It is an arithmetic number, because the mean of its divisors is an integer number (96820620120).

Almost surely, 2^645466774465 is an apocalyptic number.

It is an amenable number.

645466774465 is a deficient number, since it is larger than the sum of its proper divisors (129098186495).

645466774465 is a wasteful number, since it uses less digits than its factorization.

645466774465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805271.

The product of its digits is 406425600, while the sum is 64.

The spelling of 645466774465 in words is "six hundred forty-five billion, four hundred sixty-six million, seven hundred seventy-four thousand, four hundred sixty-five".