645135762 has 32 divisors (see below), whose sum is σ = 1308303360. Its totient is φ = 212058000.

The previous prime is 645135739. The next prime is 645135767. The reversal of 645135762 is 267531546.

It is a super-2 number, since 2×645135762² = 832400302822641288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 645135762.

It is not an unprimeable number, because it can be changed into a prime (645135767) 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, 153039 + ... + 157197.

It is an arithmetic number, because the mean of its divisors is an integer number (40884480).

Almost surely, 2^645135762 is an apocalyptic number.

645135762 is an abundant number, since it is smaller than the sum of its proper divisors (663167598).

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

645135762 is a wasteful number, since it uses less digits than its factorization.

645135762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4518.

The product of its digits is 151200, while the sum is 39.

The square root of 645135762 is about 25399.5228695344. The cubic root of 645135762 is about 864.0728756903.

The spelling of 645135762 in words is "six hundred forty-five million, one hundred thirty-five thousand, seven hundred sixty-two".