645053465 has 16 divisors (see below), whose sum is σ = 893238528. Its totient is φ = 438025536.

The previous prime is 645053443. The next prime is 645053537. The reversal of 645053465 is 564350546.

It is a happy number.

645053465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 645053465 - 2¹² = 645049369 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85862 + ... + 93071.

It is an arithmetic number, because the mean of its divisors is an integer number (55827408).

Almost surely, 2^645053465 is an apocalyptic number.

It is an amenable number.

645053465 is a deficient number, since it is larger than the sum of its proper divisors (248185063).

645053465 is a wasteful number, since it uses less digits than its factorization.

645053465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179048.

The product of its (nonzero) digits is 216000, while the sum is 38.

The square root of 645053465 is about 25397.9027677484. The cubic root of 645053465 is about 864.0361321945.

The spelling of 645053465 in words is "six hundred forty-five million, fifty-three thousand, four hundred sixty-five".