64264278016 has 117 divisors (see below), whose sum is σ = 137105553151. Its totient is φ = 30112219136.

The previous prime is 64264277983. The next prime is 64264278049. The reversal of 64264278016 is 61087246246.

It is a happy number.

The square root of 64264278016 is 253504.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (64264277983) and next prime (64264278049).

It can be written as a sum of positive squares in 4 ways, for example, as 32444416 + 64231833600 = 5696^2 + 253440^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 275812236 + ... + 275812468.

Almost surely, 2^64264278016 is an apocalyptic number.

64264278016 is the 253504-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64264278016

64264278016 is an abundant number, since it is smaller than the sum of its proper divisors (72841275135).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64264278016 is an frugal number, since it uses more digits than its factorization.

64264278016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 46.

The spelling of 64264278016 in words is "sixty-four billion, two hundred sixty-four million, two hundred seventy-eight thousand, sixteen".