64020025 has 24 divisors (see below), whose sum is σ = 85173120. Its totient is φ = 47586240.

The previous prime is 64020013. The next prime is 64020031. The reversal of 64020025 is 52002046.

It is a de Polignac number, because none of the positive numbers 2^k-64020025 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 64019984 and 64020011.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23904 + ... + 26446.

It is an arithmetic number, because the mean of its divisors is an integer number (3548880).

Almost surely, 2^64020025 is an apocalyptic number.

It is an amenable number.

64020025 is a deficient number, since it is larger than the sum of its proper divisors (21153095).

64020025 is a wasteful number, since it uses less digits than its factorization.

64020025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2625 (or 2620 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 64020025 is about 8001.2514646148. The cubic root of 64020025 is about 400.0417143996.

The spelling of 64020025 in words is "sixty-four million, twenty thousand, twenty-five".