64651265 has 8 divisors (see below), whose sum is σ = 88664640. Its totient is φ = 44332272.

The previous prime is 64651253. The next prime is 64651267. The reversal of 64651265 is 56215646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64651265 - 2⁶ = 64651201 is a prime.

It is a super-2 number, since 2×64651265² = 8359572132200450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 1847179 = 64651265 / (6 + 4 + 6 + 5 + 1 + 2 + 6 + 5).

It is not an unprimeable number, because it can be changed into a prime (64651267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 923555 + ... + 923624.

It is an arithmetic number, because the mean of its divisors is an integer number (11083080).

It is a Proth number, since it is equal to 1973 ⋅ 2¹⁵ + 1 and 1973 < 2¹⁵.

Almost surely, 2^64651265 is an apocalyptic number.

It is an amenable number.

64651265 is a deficient number, since it is larger than the sum of its proper divisors (24013375).

64651265 is a wasteful number, since it uses less digits than its factorization.

64651265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847191.

The product of its digits is 43200, while the sum is 35.

The square root of 64651265 is about 8040.6010347486. The cubic root of 64651265 is about 401.3522256467.

The spelling of 64651265 in words is "sixty-four million, six hundred fifty-one thousand, two hundred sixty-five".