64440036145 has 8 divisors (see below), whose sum is σ = 77336864640. Its totient is φ = 51546148080.

The previous prime is 64440036121. The next prime is 64440036173. The reversal of 64440036145 is 54163004446.

64440036145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64440036145 - 2¹⁵ = 64440003377 is a prime.

It is a super-2 number, since 2×64440036145² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 686601 + ... + 774790.

It is an arithmetic number, because the mean of its divisors is an integer number (9667108080).

Almost surely, 2^64440036145 is an apocalyptic number.

It is an amenable number.

64440036145 is a deficient number, since it is larger than the sum of its proper divisors (12896828495).

64440036145 is a wasteful number, since it uses less digits than its factorization.

64440036145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470215.

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 64440036145 in words is "sixty-four billion, four hundred forty million, thirty-six thousand, one hundred forty-five".