64340023815 has 16 divisors (see below), whose sum is σ = 114382264800. Its totient is φ = 34314679296.

The previous prime is 64340023801. The next prime is 64340023837. The reversal of 64340023815 is 51832004346.

64340023815 is a `hidden beast` number, since 6 + 4 + 3 + 400 + 238 + 15 = 666.

It is not a de Polignac number, because 64340023815 - 2¹⁹ = 64339499527 is a prime.

It is a super-3 number, since 3×64340023815³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64340023815.

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, 238296250 + ... + 238296519.

It is an arithmetic number, because the mean of its divisors is an integer number (7148891550).

Almost surely, 2^64340023815 is an apocalyptic number.

64340023815 is a deficient number, since it is larger than the sum of its proper divisors (50042240985).

64340023815 is a wasteful number, since it uses less digits than its factorization.

64340023815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476592783 (or 476592777 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 64340023815 in words is "sixty-four billion, three hundred forty million, twenty-three thousand, eight hundred fifteen".