64949625 has 48 divisors (see below), whose sum is σ = 126117264. Its totient is φ = 31968000.

The previous prime is 64949623. The next prime is 64949627. The reversal of 64949625 is 52694946.

It is an interprime number because it is at equal distance from previous prime (64949623) and next prime (64949627).

It can be written as a sum of positive squares in 8 ways, for example, as 37197801 + 27751824 = 6099^2 + 5268^2 .

It is not a de Polignac number, because 64949625 - 2¹ = 64949623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64949623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12405 + ... + 16845.

It is an arithmetic number, because the mean of its divisors is an integer number (2627443).

Almost surely, 2^64949625 is an apocalyptic number.

64949625 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64949625 is a deficient number, since it is larger than the sum of its proper divisors (61167639).

64949625 is a wasteful number, since it uses less digits than its factorization.

64949625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4475 (or 4462 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 64949625 is about 8059.1330178872. The cubic root of 64949625 is about 401.9686802658.

The spelling of 64949625 in words is "sixty-four million, nine hundred forty-nine thousand, six hundred twenty-five".