64861277 has 8 divisors (see below), whose sum is σ = 69917400. Its totient is φ = 59814720.

The previous prime is 64861271. The next prime is 64861283. The reversal of 64861277 is 77216846.

It is an interprime number because it is at equal distance from previous prime (64861271) and next prime (64861283).

It can be written as a sum of positive squares in 4 ways, for example, as 4239481 + 60621796 = 2059^2 + 7786^2 .

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 64861277 - 2⁴ = 64861261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64861271) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 18527 + ... + 21747.

It is an arithmetic number, because the mean of its divisors is an integer number (8739675).

Almost surely, 2^64861277 is an apocalyptic number.

It is an amenable number.

64861277 is a deficient number, since it is larger than the sum of its proper divisors (5056123).

64861277 is a wasteful number, since it uses less digits than its factorization.

64861277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4783.

The product of its digits is 112896, while the sum is 41.

The square root of 64861277 is about 8053.6499178944. The cubic root of 64861277 is about 401.7863377019.

The spelling of 64861277 in words is "sixty-four million, eight hundred sixty-one thousand, two hundred seventy-seven".