64495291 has 8 divisors (see below), whose sum is σ = 77588480. Its totient is φ = 52372008.

The previous prime is 64495279. The next prime is 64495307. The reversal of 64495291 is 19259446.

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 64495291 - 2⁵ = 64495259 is a prime.

It is a super-2 number, since 2×64495291² = 8319285122349362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64415291) 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, 242331 + ... + 242596.

It is an arithmetic number, because the mean of its divisors is an integer number (9698560).

Almost surely, 2^64495291 is an apocalyptic number.

64495291 is a deficient number, since it is larger than the sum of its proper divisors (13093189).

64495291 is a wasteful number, since it uses less digits than its factorization.

64495291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484953.

The product of its digits is 77760, while the sum is 40.

The square root of 64495291 is about 8030.8960272189. The cubic root of 64495291 is about 401.0292058172.

The spelling of 64495291 in words is "sixty-four million, four hundred ninety-five thousand, two hundred ninety-one".