64146101640 has 128 divisors (see below), whose sum is σ = 194723343360. Its totient is φ = 16903655424.

The previous prime is 64146101629. The next prime is 64146101659. The reversal of 64146101640 is 4610164146.

It is a super-2 number, since 2×64146101640² (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 31 ways as a sum of consecutive naturals, for example, 3657372 + ... + 3674868.

It is an arithmetic number, because the mean of its divisors is an integer number (1521276120).

Almost surely, 2^64146101640 is an apocalyptic number.

64146101640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64146101640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97361671680).

64146101640 is an abundant number, since it is smaller than the sum of its proper divisors (130577241720).

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

64146101640 is a wasteful number, since it uses less digits than its factorization.

64146101640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17871 (or 17867 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

Adding to 64146101640 its reverse (4610164146), we get a palindrome (68756265786).

The spelling of 64146101640 in words is "sixty-four billion, one hundred forty-six million, one hundred one thousand, six hundred forty".