645554962 has 16 divisors (see below), whose sum is σ = 1048588632. Its totient is φ = 296300160.

The previous prime is 645554941. The next prime is 645554971. The reversal of 645554962 is 269455546.

It can be written as a sum of positive squares in 4 ways, for example, as 264095001 + 381459961 = 16251^2 + 19531^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63883 + ... + 73294.

Almost surely, 2^645554962 is an apocalyptic number.

645554962 is a deficient number, since it is larger than the sum of its proper divisors (403033670).

645554962 is a wasteful number, since it uses less digits than its factorization.

645554962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137373.

The product of its digits is 1296000, while the sum is 46.

The square root of 645554962 is about 25407.7736529590. The cubic root of 645554962 is about 864.2599892376.

The spelling of 645554962 in words is "six hundred forty-five million, five hundred fifty-four thousand, nine hundred sixty-two".