64100843144 has 64 divisors (see below), whose sum is σ = 137244164400. Its totient is φ = 27804893184.

The previous prime is 64100843137. The next prime is 64100843203. The reversal of 64100843144 is 44134800146.

It can be written as a sum of positive squares in 8 ways, for example, as 32170727044 + 31930116100 = 179362^2 + 178690^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1227944 + ... + 1279080.

Almost surely, 2^64100843144 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 64100843144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68622082200).

64100843144 is an abundant number, since it is smaller than the sum of its proper divisors (73143321256).

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

64100843144 is a wasteful number, since it uses less digits than its factorization.

64100843144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51882 (or 51878 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 35.

The spelling of 64100843144 in words is "sixty-four billion, one hundred million, eight hundred forty-three thousand, one hundred forty-four".