64504618761 has 16 divisors (see below), whose sum is σ = 94301178048. Its totient is φ = 38895259200.

The previous prime is 64504618751. The next prime is 64504618793. The reversal of 64504618761 is 16781640546.

It is a happy number.

It is not a de Polignac number, because 64504618761 - 2¹⁴ = 64504602377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64504618761.

It is not an unprimeable number, because it can be changed into a prime (64504618741) 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 15 ways as a sum of consecutive naturals, for example, 4954630 + ... + 4967631.

It is an arithmetic number, because the mean of its divisors is an integer number (5893823628).

Almost surely, 2^64504618761 is an apocalyptic number.

It is an amenable number.

64504618761 is a deficient number, since it is larger than the sum of its proper divisors (29796559287).

64504618761 is a wasteful number, since it uses less digits than its factorization.

64504618761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9922472.

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 64504618761 in words is "sixty-four billion, five hundred four million, six hundred eighteen thousand, seven hundred sixty-one".