64870443538 has 16 divisors (see below), whose sum is σ = 100352609280. Its totient is φ = 31431452976.

The previous prime is 64870443529. The next prime is 64870443553. The reversal of 64870443538 is 83534407846.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2958793 + ... + 2980636.

It is an arithmetic number, because the mean of its divisors is an integer number (6272038080).

Almost surely, 2^64870443538 is an apocalyptic number.

64870443538 is a deficient number, since it is larger than the sum of its proper divisors (35482165742).

64870443538 is a wasteful number, since it uses less digits than its factorization.

64870443538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5939601.

The product of its (nonzero) digits is 7741440, while the sum is 52.

The spelling of 64870443538 in words is "sixty-four billion, eight hundred seventy million, four hundred forty-three thousand, five hundred thirty-eight".