64293194394 has 192 divisors, whose sum is σ = 176481849600. Its totient is φ = 17201669760.

The previous prime is 64293194393. The next prime is 64293194419. The reversal of 64293194394 is 49349139246.

64293194394 is a `hidden beast` number, since 64 + 2 + 9 + 3 + 194 + 394 = 666.

64293194394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64293194394² (a number of 22 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 64293194394.

It is not an unprimeable number, because it can be changed into a prime (64293194393) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1937212 + ... + 1970120.

It is an arithmetic number, because the mean of its divisors is an integer number (919176300).

Almost surely, 2^64293194394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64293194394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88240924800).

64293194394 is an abundant number, since it is smaller than the sum of its proper divisors (112188655206).

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

64293194394 is a wasteful number, since it uses less digits than its factorization.

64293194394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32978 (or 32961 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 54.

The spelling of 64293194394 in words is "sixty-four billion, two hundred ninety-three million, one hundred ninety-four thousand, three hundred ninety-four".