64403026656431 has 8 divisors (see below), whose sum is σ = 64552795444224. Its totient is φ = 64253259451960.

The previous prime is 64403026656407. The next prime is 64403026656439. The reversal of 64403026656431 is 13465662030446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64403026656431 - 2¹⁴ = 64403026640047 is a prime.

It is a super-2 number, since 2×64403026656431² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64403026656431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64403026656439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133993766 + ... + 134473548.

It is an arithmetic number, because the mean of its divisors is an integer number (8069099430528).

Almost surely, 2^{64403026656431} is an apocalyptic number.

64403026656431 is a deficient number, since it is larger than the sum of its proper divisors (149768787793).

64403026656431 is a wasteful number, since it uses less digits than its factorization.

64403026656431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791661.

The product of its (nonzero) digits is 7464960, while the sum is 50.

Adding to 64403026656431 its reverse (13465662030446), we get a palindrome (77868688686877).

The spelling of 64403026656431 in words is "sixty-four trillion, four hundred three billion, twenty-six million, six hundred fifty-six thousand, four hundred thirty-one".