64841591557 has 8 divisors (see below), whose sum is σ = 66421279872. Its totient is φ = 63270240000.

The previous prime is 64841591537. The next prime is 64841591561. The reversal of 64841591557 is 75519514846.

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

It is a cyclic number.

It is not a de Polignac number, because 64841591557 - 2¹¹ = 64841589509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64841591498 and 64841591507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64841591537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2068444 + ... + 2099557.

It is an arithmetic number, because the mean of its divisors is an integer number (8302659984).

Almost surely, 2^64841591557 is an apocalyptic number.

It is an amenable number.

64841591557 is a deficient number, since it is larger than the sum of its proper divisors (1579688315).

64841591557 is a wasteful number, since it uses less digits than its factorization.

64841591557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4168379.

The product of its digits is 6048000, while the sum is 55.

The spelling of 64841591557 in words is "sixty-four billion, eight hundred forty-one million, five hundred ninety-one thousand, five hundred fifty-seven".