64750144441 has 12 divisors (see below), whose sum is σ = 68443278912. Its totient is φ = 61247210904.

The previous prime is 64750144427. The next prime is 64750144463. The reversal of 64750144441 is 14444105746.

It is a happy number.

It is not a de Polignac number, because 64750144441 - 2³¹ = 62602660793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64750144394 and 64750144403.

It is not an unprimeable number, because it can be changed into a prime (64750145441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94956 + ... + 372178.

It is an arithmetic number, because the mean of its divisors is an integer number (5703606576).

Almost surely, 2^64750144441 is an apocalyptic number.

It is an amenable number.

64750144441 is a deficient number, since it is larger than the sum of its proper divisors (3693134471).

64750144441 is a wasteful number, since it uses less digits than its factorization.

64750144441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277908 (or 277889 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 40.

The spelling of 64750144441 in words is "sixty-four billion, seven hundred fifty million, one hundred forty-four thousand, four hundred forty-one".