64784340870 has 32 divisors (see below), whose sum is σ = 156512113920. Its totient is φ = 17161413600.

The previous prime is 64784340853. The next prime is 64784340883. The reversal of 64784340870 is 7804348746.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7146060 + ... + 7155119.

It is an arithmetic number, because the mean of its divisors is an integer number (4891003560).

Almost surely, 2^64784340870 is an apocalyptic number.

64784340870 is an abundant number, since it is smaller than the sum of its proper divisors (91727773050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64784340870 is a wasteful number, since it uses less digits than its factorization.

64784340870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14301340.

The product of its (nonzero) digits is 3612672, while the sum is 51.

The spelling of 64784340870 in words is "sixty-four billion, seven hundred eighty-four million, three hundred forty thousand, eight hundred seventy".