64191056773652 has 12 divisors (see below), whose sum is σ = 112824892365780. Its totient is φ = 31955373240576.

The previous prime is 64191056773579. The next prime is 64191056773691. The reversal of 64191056773652 is 25637765019146.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 34883623687696 + 29307433085956 = 5906236^2 + 5413634^2 .

It is a super-2 number, since 2×64191056773652² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 35038785533 + ... + 35038787364.

It is an arithmetic number, because the mean of its divisors is an integer number (9402074363815).

Almost surely, 2^{64191056773652} is an apocalyptic number.

It is an amenable number.

64191056773652 is a deficient number, since it is larger than the sum of its proper divisors (48633835592128).

64191056773652 is a wasteful number, since it uses less digits than its factorization.

64191056773652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70077573130 (or 70077573128 counting only the distinct ones).

The product of its (nonzero) digits is 57153600, while the sum is 62.

The spelling of 64191056773652 in words is "sixty-four trillion, one hundred ninety-one billion, fifty-six million, seven hundred seventy-three thousand, six hundred fifty-two".