64563432654 has 64 divisors (see below), whose sum is σ = 151540291584. Its totient is φ = 17953893216.

The previous prime is 64563432649. The next prime is 64563432673. The reversal of 64563432654 is 45623436546.

64563432654 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 447937 + ... + 574259.

It is an arithmetic number, because the mean of its divisors is an integer number (2367817056).

Almost surely, 2^64563432654 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64563432654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75770145792).

64563432654 is an abundant number, since it is smaller than the sum of its proper divisors (86976858930).

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

64563432654 is a wasteful number, since it uses less digits than its factorization.

64563432654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126661.

The product of its digits is 6220800, while the sum is 48.

The spelling of 64563432654 in words is "sixty-four billion, five hundred sixty-three million, four hundred thirty-two thousand, six hundred fifty-four".