64475198964 has 288 divisors, whose sum is σ = 188933713920. Its totient is φ = 18992413440.

The previous prime is 64475198833. The next prime is 64475198987. The reversal of 64475198964 is 46989157446.

64475198964 is a `hidden beast` number, since 6 + 447 + 51 + 9 + 89 + 64 = 666.

64475198964 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 95 ways as a sum of consecutive naturals, for example, 87960342 + ... + 87961074.

It is an arithmetic number, because the mean of its divisors is an integer number (656019840).

Almost surely, 2^64475198964 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64475198964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94466856960).

64475198964 is an abundant number, since it is smaller than the sum of its proper divisors (124458514956).

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

64475198964 is a wasteful number, since it uses less digits than its factorization.

64475198964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948 (or 929 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The spelling of 64475198964 in words is "sixty-four billion, four hundred seventy-five million, one hundred ninety-eight thousand, nine hundred sixty-four".