64438696053 has 24 divisors (see below), whose sum is σ = 93310752600. Its totient is φ = 42851856384.

The previous prime is 64438696001. The next prime is 64438696073. The reversal of 64438696053 is 35069683446.

It can be written as a sum of positive squares in 4 ways, for example, as 6418893924 + 58019802129 = 80118^2 + 240873^2 .

It is not a de Polignac number, because 64438696053 - 2²² = 64434501749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64438696073) 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 in 23 ways as a sum of consecutive naturals, for example, 16567533 + ... + 16571421.

It is an arithmetic number, because the mean of its divisors is an integer number (3887948025).

Almost surely, 2^64438696053 is an apocalyptic number.

It is an amenable number.

64438696053 is a deficient number, since it is larger than the sum of its proper divisors (28872056547).

64438696053 is a wasteful number, since it uses less digits than its factorization.

64438696053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8021 (or 8018 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 54.

The spelling of 64438696053 in words is "sixty-four billion, four hundred thirty-eight million, six hundred ninety-six thousand, fifty-three".