64689550423 has 8 divisors (see below), whose sum is σ = 64805619200. Its totient is φ = 64573577568.

The previous prime is 64689550403. The next prime is 64689550507. The reversal of 64689550423 is 32405598646.

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 64689550423 - 2¹⁷ = 64689419351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64689550403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1400938 + ... + 1446376.

It is an arithmetic number, because the mean of its divisors is an integer number (8100702400).

Almost surely, 2^64689550423 is an apocalyptic number.

64689550423 is a deficient number, since it is larger than the sum of its proper divisors (116068777).

64689550423 is a wasteful number, since it uses less digits than its factorization.

64689550423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47961.

The product of its (nonzero) digits is 6220800, while the sum is 52.

The spelling of 64689550423 in words is "sixty-four billion, six hundred eighty-nine million, five hundred fifty thousand, four hundred twenty-three".