645525411365 has 8 divisors (see below), whose sum is σ = 775538623608. Its totient is φ = 515814909120.

The previous prime is 645525411361. The next prime is 645525411371. The reversal of 645525411365 is 563114525546.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 25309309921 + 620216101444 = 159089^2 + 787538^2 .

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

It is not a de Polignac number, because 645525411365 - 2² = 645525411361 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645525411361) 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, 75672806 + ... + 75681335.

It is an arithmetic number, because the mean of its divisors is an integer number (96942327951).

Almost surely, 2^645525411365 is an apocalyptic number.

It is an amenable number.

645525411365 is a deficient number, since it is larger than the sum of its proper divisors (130013212243).

645525411365 is a wasteful number, since it uses less digits than its factorization.

645525411365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151354999.

The product of its digits is 2160000, while the sum is 47.

The spelling of 645525411365 in words is "six hundred forty-five billion, five hundred twenty-five million, four hundred eleven thousand, three hundred sixty-five".