64112037440 has 672 divisors, whose sum is σ = 194034216960. Its totient is φ = 19928678400.

The previous prime is 64112037413. The next prime is 64112037467. The reversal of 64112037440 is 4473021146.

It is an interprime number because it is at equal distance from previous prime (64112037413) and next prime (64112037467).

It is a super-2 number, since 2×64112037440² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 64112037397 and 64112037406.

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, 599177867 + ... + 599177973.

Almost surely, 2^64112037440 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 64112037440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97017108480).

64112037440 is an abundant number, since it is smaller than the sum of its proper divisors (129922179520).

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

64112037440 is a wasteful number, since it uses less digits than its factorization.

64112037440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

Adding to 64112037440 its reverse (4473021146), we get a palindrome (68585058586).

The spelling of 64112037440 in words is "sixty-four billion, one hundred twelve million, thirty-seven thousand, four hundred forty".