64033394641 has 32 divisors (see below), whose sum is σ = 69549611040. Its totient is φ = 58732646400.

The previous prime is 64033394627. The next prime is 64033394657. The reversal of 64033394641 is 14649333046.

64033394641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 16 ways, for example, as 35345504016 + 28687890625 = 188004^2 + 169375^2 .

It is a cyclic number.

It is not a de Polignac number, because 64033394641 - 2¹¹ = 64033392593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64033394741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73013695 + ... + 73014571.

It is an arithmetic number, because the mean of its divisors is an integer number (2173425345).

Almost surely, 2^64033394641 is an apocalyptic number.

64033394641 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

64033394641 is a deficient number, since it is larger than the sum of its proper divisors (5516216399).

64033394641 is a wasteful number, since it uses less digits than its factorization.

64033394641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525.

The product of its (nonzero) digits is 559872, while the sum is 43.

The spelling of 64033394641 in words is "sixty-four billion, thirty-three million, three hundred ninety-four thousand, six hundred forty-one".