64470781884 has 12 divisors (see below), whose sum is σ = 150431824424. Its totient is φ = 21490260624.

The previous prime is 64470781883. The next prime is 64470781901. The reversal of 64470781884 is 48818707446.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64470781883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2686282567 + ... + 2686282590.

Almost surely, 2^64470781884 is an apocalyptic number.

It is an amenable number.

64470781884 is an abundant number, since it is smaller than the sum of its proper divisors (85961042540).

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

64470781884 is a wasteful number, since it uses less digits than its factorization.

64470781884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5372565164 (or 5372565162 counting only the distinct ones).

The product of its (nonzero) digits is 9633792, while the sum is 57.

The spelling of 64470781884 in words is "sixty-four billion, four hundred seventy million, seven hundred eighty-one thousand, eight hundred eighty-four".