64735469569 has 4 divisors (see below), whose sum is σ = 65164181440. Its totient is φ = 64306757700.

The previous prime is 64735469551. The next prime is 64735469573. The reversal of 64735469569 is 96596453746.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64735469569 - 2⁵ = 64735469537 is a prime.

It is a super-2 number, since 2×64735469569² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64735469569.

It is not an unprimeable number, because it can be changed into a prime (64735461569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214355709 + ... + 214356010.

It is an arithmetic number, because the mean of its divisors is an integer number (16291045360).

Almost surely, 2^64735469569 is an apocalyptic number.

It is an amenable number.

64735469569 is a deficient number, since it is larger than the sum of its proper divisors (428711871).

64735469569 is a wasteful number, since it uses less digits than its factorization.

64735469569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428711870.

The product of its digits is 146966400, while the sum is 64.

The spelling of 64735469569 in words is "sixty-four billion, seven hundred thirty-five million, four hundred sixty-nine thousand, five hundred sixty-nine".