645586476 has 12 divisors (see below), whose sum is σ = 1506368472. Its totient is φ = 215195488.

The previous prime is 645586463. The next prime is 645586489. The reversal of 645586476 is 674685546.

It is an interprime number because it is at equal distance from previous prime (645586463) and next prime (645586489).

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26899425 + ... + 26899448.

It is an arithmetic number, because the mean of its divisors is an integer number (125530706).

Almost surely, 2^645586476 is an apocalyptic number.

It is an amenable number.

645586476 is an abundant number, since it is smaller than the sum of its proper divisors (860781996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645586476 is a wasteful number, since it uses less digits than its factorization.

645586476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53798880 (or 53798878 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 51.

The square root of 645586476 is about 25408.3938099204. The cubic root of 645586476 is about 864.2740525101.

The spelling of 645586476 in words is "six hundred forty-five million, five hundred eighty-six thousand, four hundred seventy-six".