645113276 has 12 divisors (see below), whose sum is σ = 1129202760. Its totient is φ = 322483920.

The previous prime is 645113239. The next prime is 645113279. The reversal of 645113276 is 672311546.

It is a super-2 number, since 2×645113276² = 832342277742904352, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645113279) by changing a digit.

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, 5090 + ... + 36278.

It is an arithmetic number, because the mean of its divisors is an integer number (94100230).

Almost surely, 2^645113276 is an apocalyptic number.

It is an amenable number.

645113276 is a deficient number, since it is larger than the sum of its proper divisors (484089484).

645113276 is a wasteful number, since it uses less digits than its factorization.

645113276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36364 (or 36362 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 645113276 is about 25399.0802195670. The cubic root of 645113276 is about 864.0628365793.

The spelling of 645113276 in words is "six hundred forty-five million, one hundred thirteen thousand, two hundred seventy-six".