64806625 has 32 divisors (see below), whose sum is σ = 91728000. Its totient is φ = 45316800.

The previous prime is 64806613. The next prime is 64806631. The reversal of 64806625 is 52660846.

It is not a de Polignac number, because 64806625 - 2⁵ = 64806593 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 29826 + ... + 31924.

It is an arithmetic number, because the mean of its divisors is an integer number (2866500).

Almost surely, 2^64806625 is an apocalyptic number.

64806625 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64806625 is a deficient number, since it is larger than the sum of its proper divisors (26921375).

64806625 is a wasteful number, since it uses less digits than its factorization.

64806625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2146 (or 2136 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 64806625 is about 8050.2562071030. The cubic root of 64806625 is about 401.6734578338.

It can be divided in two parts, 648066 and 25, that added together give a triangular number (648091 = T₁₁₃₈).

The spelling of 64806625 in words is "sixty-four million, eight hundred six thousand, six hundred twenty-five".