64403161074 has 300 divisors, whose sum is σ = 176552760846. Its totient is φ = 17544631104.

The previous prime is 64403161061. The next prime is 64403161079. The reversal of 64403161074 is 47016130446.

64403161074 is a `hidden beast` number, since 6 + 4 + 4 + 0 + 31 + 610 + 7 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 64300280625 + 102880449 = 253575^2 + 10143^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64403161079) by changing a digit.

It is a polite number, since it can be written in 149 ways as a sum of consecutive naturals, for example, 205760742 + ... + 205761054.

Almost surely, 2^64403161074 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64403161074, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88276380423).

64403161074 is an abundant number, since it is smaller than the sum of its proper divisors (112149599772).

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

64403161074 is an equidigital number, since it uses as much as digits as its factorization.

64403161074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 64403161074 in words is "sixty-four billion, four hundred three million, one hundred sixty-one thousand, seventy-four".