64021154449 has 4 divisors (see below), whose sum is σ = 73167033664. Its totient is φ = 54875275236.

The previous prime is 64021154447. The next prime is 64021154459. The reversal of 64021154449 is 94445112046.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64021154449 - 2¹ = 64021154447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64021154447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4572939597 + ... + 4572939610.

It is an arithmetic number, because the mean of its divisors is an integer number (18291758416).

Almost surely, 2^64021154449 is an apocalyptic number.

It is an amenable number.

64021154449 is a deficient number, since it is larger than the sum of its proper divisors (9145879215).

64021154449 is an equidigital number, since it uses as much as digits as its factorization.

64021154449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9145879214.

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 64021154449 in words is "sixty-four billion, twenty-one million, one hundred fifty-four thousand, four hundred forty-nine".