645086083 has 16 divisors (see below), whose sum is σ = 692919360. Its totient is φ = 598980096.

The previous prime is 645086053. The next prime is 645086093. The reversal of 645086083 is 380680546.

It is a cyclic number.

It is not a de Polignac number, because 645086083 - 2¹⁷ = 644955011 is a prime.

It is a super-2 number, since 2×645086083² = 832272108960565778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645086053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 687991 + ... + 688927.

It is an arithmetic number, because the mean of its divisors is an integer number (43307460).

Almost surely, 2^645086083 is an apocalyptic number.

645086083 is a deficient number, since it is larger than the sum of its proper divisors (47833277).

645086083 is a wasteful number, since it uses less digits than its factorization.

645086083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 645086083 is about 25398.5448992654. The cubic root of 645086083 is about 864.0506956672.

The spelling of 645086083 in words is "six hundred forty-five million, eighty-six thousand, eighty-three".