64720035465 has 16 divisors (see below), whose sum is σ = 103981739136. Its totient is φ = 34374124800.

The previous prime is 64720035463. The next prime is 64720035481. The reversal of 64720035465 is 56453002746.

It is not a de Polignac number, because 64720035465 - 2¹ = 64720035463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64720035461) 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 15 ways as a sum of consecutive naturals, for example, 8947981 + ... + 8955210.

It is an arithmetic number, because the mean of its divisors is an integer number (6498858696).

Almost surely, 2^64720035465 is an apocalyptic number.

It is an amenable number.

64720035465 is a deficient number, since it is larger than the sum of its proper divisors (39261703671).

64720035465 is a wasteful number, since it uses less digits than its factorization.

64720035465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17903440.

The product of its (nonzero) digits is 604800, while the sum is 42.

The spelling of 64720035465 in words is "sixty-four billion, seven hundred twenty million, thirty-five thousand, four hundred sixty-five".