64688561423 has 2 divisors, whose sum is σ = 64688561424. Its totient is φ = 64688561422.

The previous prime is 64688561417. The next prime is 64688561453. The reversal of 64688561423 is 32416588646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64688561423 - 2³⁴ = 47508692239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64688561453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32344280711 + 32344280712.

It is an arithmetic number, because the mean of its divisors is an integer number (32344280712).

Almost surely, 2^64688561423 is an apocalyptic number.

64688561423 is a deficient number, since it is larger than the sum of its proper divisors (1).

64688561423 is an equidigital number, since it uses as much as digits as its factorization.

64688561423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6635520, while the sum is 53.

The spelling of 64688561423 in words is "sixty-four billion, six hundred eighty-eight million, five hundred sixty-one thousand, four hundred twenty-three".