64879386490 has 16 divisors (see below), whose sum is σ = 116892776448. Its totient is φ = 25927336656.

The previous prime is 64879386443. The next prime is 64879386491. The reversal of 64879386490 is 9468397846.

It is not an unprimeable number, because it can be changed into a prime (64879386491) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3041082 + ... + 3062341.

It is an arithmetic number, because the mean of its divisors is an integer number (7305798528).

Almost surely, 2^64879386490 is an apocalyptic number.

64879386490 is a deficient number, since it is larger than the sum of its proper divisors (52013389958).

64879386490 is a wasteful number, since it uses less digits than its factorization.

64879386490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6104493.

The product of its (nonzero) digits is 62705664, while the sum is 64.

The spelling of 64879386490 in words is "sixty-four billion, eight hundred seventy-nine million, three hundred eighty-six thousand, four hundred ninety".