64911487 has 8 divisors (see below), whose sum is σ = 66869712. Its totient is φ = 62971200.

The previous prime is 64911449. The next prime is 64911499. The reversal of 64911487 is 78411946.

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 64911487 - 2¹⁵ = 64878719 is a prime.

It is a super-2 number, since 2×64911487² = 8427002289102338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64912487) 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 7 ways as a sum of consecutive naturals, for example, 3048 + ... + 11794.

It is an arithmetic number, because the mean of its divisors is an integer number (8358714).

Almost surely, 2^64911487 is an apocalyptic number.

64911487 is a deficient number, since it is larger than the sum of its proper divisors (1958225).

64911487 is a wasteful number, since it uses less digits than its factorization.

64911487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8969.

The product of its digits is 48384, while the sum is 40.

The square root of 64911487 is about 8056.7665350313. The cubic root of 64911487 is about 401.8899870575.

The spelling of 64911487 in words is "sixty-four million, nine hundred eleven thousand, four hundred eighty-seven".