64535158464 has 448 divisors, whose sum is σ = 214665421824. Its totient is φ = 16689659904.

The previous prime is 64535158459. The next prime is 64535158547. The reversal of 64535158464 is 46485153546.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (51).

Its product of digits (6912000) is a multiple of the sum of its prime factors (960).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 82001079 + ... + 82001865.

It is an arithmetic number, because the mean of its divisors is an integer number (479163888).

Almost surely, 2^64535158464 is an apocalyptic number.

64535158464 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64535158464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107332710912).

64535158464 is an abundant number, since it is smaller than the sum of its proper divisors (150130263360).

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

64535158464 is a wasteful number, since it uses less digits than its factorization.

64535158464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960 (or 950 counting only the distinct ones).

The product of its digits is 6912000, while the sum is 51.

The spelling of 64535158464 in words is "sixty-four billion, five hundred thirty-five million, one hundred fifty-eight thousand, four hundred sixty-four".