64838739770 has 32 divisors (see below), whose sum is σ = 133424323200. Its totient is φ = 22223462976.

The previous prime is 64838739733. The next prime is 64838739773. The reversal of 64838739770 is 7793783846.

64838739770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (64838739773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82601 + ... + 369459.

It is an arithmetic number, because the mean of its divisors is an integer number (4169510100).

Almost surely, 2^64838739770 is an apocalyptic number.

64838739770 is an abundant number, since it is smaller than the sum of its proper divisors (68585583430).

64838739770 is a wasteful number, since it uses less digits than its factorization.

64838739770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290102.

The product of its (nonzero) digits is 42674688, while the sum is 62.

The spelling of 64838739770 in words is "sixty-four billion, eight hundred thirty-eight million, seven hundred thirty-nine thousand, seven hundred seventy".