64256369870 has 32 divisors (see below), whose sum is σ = 144201309696. Its totient is φ = 20027959200.

The previous prime is 64256369851. The next prime is 64256369911. The reversal of 64256369870 is 7896365246.

It is a happy number.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41724146 + ... + 41725685.

It is an arithmetic number, because the mean of its divisors is an integer number (4506290928).

Almost surely, 2^64256369870 is an apocalyptic number.

64256369870 is an abundant number, since it is smaller than the sum of its proper divisors (79944939826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64256369870 is a wasteful number, since it uses less digits than its factorization.

64256369870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83449856.

The product of its (nonzero) digits is 13063680, while the sum is 56.

The spelling of 64256369870 in words is "sixty-four billion, two hundred fifty-six million, three hundred sixty-nine thousand, eight hundred seventy".