64896251 has 4 divisors (see below), whose sum is σ = 74167152. Its totient is φ = 55625352.

The previous prime is 64896241. The next prime is 64896257. The reversal of 64896251 is 15269846.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15269846 = 2 ⋅7634923.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64896251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64896199 and 64896208.

It is not an unprimeable number, because it can be changed into a prime (64896257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4635440 + ... + 4635453.

It is an arithmetic number, because the mean of its divisors is an integer number (18541788).

Almost surely, 2^64896251 is an apocalyptic number.

64896251 is a deficient number, since it is larger than the sum of its proper divisors (9270901).

64896251 is an equidigital number, since it uses as much as digits as its factorization.

64896251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9270900.

The product of its digits is 103680, while the sum is 41.

The square root of 64896251 is about 8055.8209389236. The cubic root of 64896251 is about 401.8585407744.

The spelling of 64896251 in words is "sixty-four million, eight hundred ninety-six thousand, two hundred fifty-one".