64606348278 has 48 divisors (see below), whose sum is σ = 145511795520. Its totient is φ = 21483984456.

The previous prime is 64606348253. The next prime is 64606348309. The reversal of 64606348278 is 87284360646.

64606348278 is a `hidden beast` number, since 6 + 4 + 606 + 3 + 4 + 8 + 27 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45001 + ... + 362267.

It is an arithmetic number, because the mean of its divisors is an integer number (3031495740).

Almost surely, 2^64606348278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64606348278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72755897760).

64606348278 is an abundant number, since it is smaller than the sum of its proper divisors (80905447242).

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

64606348278 is a wasteful number, since it uses less digits than its factorization.

64606348278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317703 (or 317691 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 54.

The spelling of 64606348278 in words is "sixty-four billion, six hundred six million, three hundred forty-eight thousand, two hundred seventy-eight".