64663535004 has 24 divisors (see below), whose sum is σ = 155748730368. Its totient is φ = 20859204720.

The previous prime is 64663535003. The next prime is 64663535017. The reversal of 64663535004 is 40053536646.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64663535003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86912982 + ... + 86913725.

It is an arithmetic number, because the mean of its divisors is an integer number (6489530432).

Almost surely, 2^64663535004 is an apocalyptic number.

It is an amenable number.

64663535004 is an abundant number, since it is smaller than the sum of its proper divisors (91085195364).

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

64663535004 is a wasteful number, since it uses less digits than its factorization.

64663535004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173826745 (or 173826743 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 42.

The spelling of 64663535004 in words is "sixty-four billion, six hundred sixty-three million, five hundred thirty-five thousand, four".