64781051684 has 12 divisors (see below), whose sum is σ = 119333516400. Its totient is φ = 30685761288.

The previous prime is 64781051639. The next prime is 64781051689. The reversal of 64781051684 is 48615018746.

It is not an unprimeable number, because it can be changed into a prime (64781051689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426191054 + ... + 426191205.

It is an arithmetic number, because the mean of its divisors is an integer number (9944459700).

Almost surely, 2^64781051684 is an apocalyptic number.

It is an amenable number.

64781051684 is a deficient number, since it is larger than the sum of its proper divisors (54552464716).

64781051684 is a wasteful number, since it uses less digits than its factorization.

64781051684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852382282 (or 852382280 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 64781051684 in words is "sixty-four billion, seven hundred eighty-one million, fifty-one thousand, six hundred eighty-four".