64025645 has 4 divisors (see below), whose sum is σ = 76830780. Its totient is φ = 51220512.

The previous prime is 64025623. The next prime is 64025657. The reversal of 64025645 is 54652046.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42994249 + 21031396 = 6557^2 + 4586^2 .

It is a cyclic number.

It is not a de Polignac number, because 64025645 - 2¹⁸ = 63763501 is a prime.

It is a super-3 number, since 3×64025645³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6402560 + ... + 6402569.

It is an arithmetic number, because the mean of its divisors is an integer number (19207695).

Almost surely, 2^64025645 is an apocalyptic number.

It is an amenable number.

64025645 is a deficient number, since it is larger than the sum of its proper divisors (12805135).

64025645 is a wasteful number, since it uses less digits than its factorization.

64025645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12805134.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 64025645 is about 8001.6026519692. The cubic root of 64025645 is about 400.0534199488.

The spelling of 64025645 in words is "sixty-four million, twenty-five thousand, six hundred forty-five".