64244525 has 12 divisors (see below), whose sum is σ = 79876212. Its totient is φ = 51258240.

The previous prime is 64244507. The next prime is 64244539. The reversal of 64244525 is 52544246.

It can be written as a sum of positive squares in 6 ways, for example, as 3232804 + 61011721 = 1798^2 + 7811^2 .

It is not a de Polignac number, because 64244525 - 2⁶ = 64244461 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64244491 and 64244500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6689 + ... + 13161.

It is an arithmetic number, because the mean of its divisors is an integer number (6656351).

Almost surely, 2^64244525 is an apocalyptic number.

It is an amenable number.

64244525 is a deficient number, since it is larger than the sum of its proper divisors (15631687).

64244525 is a wasteful number, since it uses less digits than its factorization.

64244525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6880 (or 6875 counting only the distinct ones).

The product of its digits is 38400, while the sum is 32.

The square root of 64244525 is about 8015.2682425481. The cubic root of 64244525 is about 400.5087796671.

The spelling of 64244525 in words is "sixty-four million, two hundred forty-four thousand, five hundred twenty-five".