64841591560 has 32 divisors (see below), whose sum is σ = 147740342400. Its totient is φ = 25608323520.

The previous prime is 64841591537. The next prime is 64841591561. The reversal of 64841591560 is 6519514846.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (64841591561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10256586 + ... + 10262905.

It is an arithmetic number, because the mean of its divisors is an integer number (4616885700).

Almost surely, 2^64841591560 is an apocalyptic number.

It is an amenable number.

64841591560 is an abundant number, since it is smaller than the sum of its proper divisors (82898750840).

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

64841591560 is a wasteful number, since it uses less digits than its factorization.

64841591560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20519581 (or 20519577 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 49.

The spelling of 64841591560 in words is "sixty-four billion, eight hundred forty-one million, five hundred ninety-one thousand, five hundred sixty".