64900649 has 12 divisors (see below), whose sum is σ = 72554160. Its totient is φ = 57994200.

The previous prime is 64900643. The next prime is 64900657. The reversal of 64900649 is 94600946.

It is not a de Polignac number, because 64900649 - 2²⁰ = 63852073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64900643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2594 + ... + 11684.

It is an arithmetic number, because the mean of its divisors is an integer number (6046180).

Almost surely, 2^64900649 is an apocalyptic number.

It is an amenable number.

64900649 is a deficient number, since it is larger than the sum of its proper divisors (7653511).

64900649 is a wasteful number, since it uses less digits than its factorization.

64900649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9172 (or 9161 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 64900649 is about 8056.0939046166. The cubic root of 64900649 is about 401.8676185147.

It can be divided in two parts, 64900 and 649, that multiplied together give a square (42120100 = 6490²).

The spelling of 64900649 in words is "sixty-four million, nine hundred thousand, six hundred forty-nine".