64235456138 has 8 divisors (see below), whose sum is σ = 110117924832. Its totient is φ = 27529481196.

The previous prime is 64235456123. The next prime is 64235456143. The reversal of 64235456138 is 83165453246.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64235456092 and 64235456101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2294123420 + ... + 2294123447.

It is an arithmetic number, because the mean of its divisors is an integer number (13764740604).

Almost surely, 2^64235456138 is an apocalyptic number.

64235456138 is a deficient number, since it is larger than the sum of its proper divisors (45882468694).

64235456138 is a wasteful number, since it uses less digits than its factorization.

64235456138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4588246876.

The product of its digits is 2073600, while the sum is 47.

The spelling of 64235456138 in words is "sixty-four billion, two hundred thirty-five million, four hundred fifty-six thousand, one hundred thirty-eight".