64674520123 has 4 divisors (see below), whose sum is σ = 65013130368. Its totient is φ = 64335909880.

The previous prime is 64674520121. The next prime is 64674520153. The reversal of 64674520123 is 32102547646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64674520123 - 2¹ = 64674520121 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64674520121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169304836 + ... + 169305217.

It is an arithmetic number, because the mean of its divisors is an integer number (16253282592).

Almost surely, 2^64674520123 is an apocalyptic number.

64674520123 is a deficient number, since it is larger than the sum of its proper divisors (338610245).

64674520123 is a wasteful number, since it uses less digits than its factorization.

64674520123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338610244.

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 64674520123 in words is "sixty-four billion, six hundred seventy-four million, five hundred twenty thousand, one hundred twenty-three".