64365665487 has 8 divisors (see below), whose sum is σ = 85948409904. Its totient is φ = 42846682368.

The previous prime is 64365665477. The next prime is 64365665519. The reversal of 64365665487 is 78456656346.

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

It is not a de Polignac number, because 64365665487 - 2⁷ = 64365665359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64365665487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64365665407) 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, 15937968 + ... + 15942005.

It is an arithmetic number, because the mean of its divisors is an integer number (10743551238).

Almost surely, 2^64365665487 is an apocalyptic number.

64365665487 is a deficient number, since it is larger than the sum of its proper divisors (21582744417).

64365665487 is a wasteful number, since it uses less digits than its factorization.

64365665487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31880649.

The product of its digits is 87091200, while the sum is 60.

The spelling of 64365665487 in words is "sixty-four billion, three hundred sixty-five million, six hundred sixty-five thousand, four hundred eighty-seven".