64141905505 has 16 divisors (see below), whose sum is σ = 84308227920. Its totient is φ = 46629732352.

The previous prime is 64141905473. The next prime is 64141905517. The reversal of 64141905505 is 50550914146.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 6810870784 + 57331034721 = 82528^2 + 239439^2 .

It is a cyclic number.

It is not a de Polignac number, because 64141905505 - 2⁵ = 64141905473 is a prime.

It is a super-2 number, since 2×64141905505² (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 15 ways as a sum of consecutive naturals, for example, 13008064 + ... + 13012993.

It is an arithmetic number, because the mean of its divisors is an integer number (5269264245).

Almost surely, 2^64141905505 is an apocalyptic number.

It is an amenable number.

64141905505 is a deficient number, since it is larger than the sum of its proper divisors (20166322415).

64141905505 is a wasteful number, since it uses less digits than its factorization.

64141905505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26021108.

The product of its (nonzero) digits is 108000, while the sum is 40.

The spelling of 64141905505 in words is "sixty-four billion, one hundred forty-one million, nine hundred five thousand, five hundred five".