645960577 has 8 divisors (see below), whose sum is σ = 699865056. Its totient is φ = 593823552.

The previous prime is 645960569. The next prime is 645960593. The reversal of 645960577 is 775069546.

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 645960577 - 2³ = 645960569 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 645960577.

It is not an unprimeable number, because it can be changed into a prime (645960517) 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, 441103 + ... + 442564.

It is an arithmetic number, because the mean of its divisors is an integer number (87483132).

Almost surely, 2^645960577 is an apocalyptic number.

It is an amenable number.

645960577 is a deficient number, since it is larger than the sum of its proper divisors (53904479).

645960577 is a wasteful number, since it uses less digits than its factorization.

645960577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883727.

The product of its (nonzero) digits is 1587600, while the sum is 49.

The square root of 645960577 is about 25415.7545038506. The cubic root of 645960577 is about 864.4409619103.

The spelling of 645960577 in words is "six hundred forty-five million, nine hundred sixty thousand, five hundred seventy-seven".