64451405716 has 6 divisors (see below), whose sum is σ = 112789960010. Its totient is φ = 32225702856.

The previous prime is 64451405663. The next prime is 64451405717. The reversal of 64451405716 is 61750415446.

It can be written as a sum of positive squares in only one way, i.e., 64297744900 + 153660816 = 253570^2 + 12396^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64451405717) 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 as a sum of consecutive naturals, namely, 8056425711 + ... + 8056425718.

Almost surely, 2^64451405716 is an apocalyptic number.

It is an amenable number.

64451405716 is a deficient number, since it is larger than the sum of its proper divisors (48338554294).

64451405716 is a wasteful number, since it uses less digits than its factorization.

64451405716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16112851433 (or 16112851431 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 64451405716 in words is "sixty-four billion, four hundred fifty-one million, four hundred five thousand, seven hundred sixteen".