64633545 has 20 divisors (see below), whose sum is σ = 115862340. Its totient is φ = 34471008.

The previous prime is 64633537. The next prime is 64633559. The reversal of 64633545 is 54533646.

64633545 is a `hidden beast` number, since 646 + 3 + 3 + 5 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10036224 + 54597321 = 3168^2 + 7389^2 .

It is not a de Polignac number, because 64633545 - 2³ = 64633537 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 79390 + ... + 80199.

It is an arithmetic number, because the mean of its divisors is an integer number (5793117).

Almost surely, 2^64633545 is an apocalyptic number.

It is an amenable number.

64633545 is a deficient number, since it is larger than the sum of its proper divisors (51228795).

64633545 is a wasteful number, since it uses less digits than its factorization.

64633545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159606 (or 159597 counting only the distinct ones).

The product of its digits is 129600, while the sum is 36.

The square root of 64633545 is about 8039.4990515579. The cubic root of 64633545 is about 401.3155539677.

It can be divided in two parts, 646 and 33545, that added together give a triangular number (34191 = T₂₆₁).

The spelling of 64633545 in words is "sixty-four million, six hundred thirty-three thousand, five hundred forty-five".