64144644146 has 24 divisors (see below), whose sum is σ = 105789008640. Its totient is φ = 29148423480.

The previous prime is 64144644143. The next prime is 64144644229.

64144644146 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×64144644146² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 64144644097 and 64144644106.

It is not an unprimeable number, because it can be changed into a prime (64144644143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 866375 + ... + 937493.

It is an arithmetic number, because the mean of its divisors is an integer number (4407875360).

Almost surely, 2^64144644146 is an apocalyptic number.

64144644146 is a deficient number, since it is larger than the sum of its proper divisors (41644364494).

64144644146 is a wasteful number, since it uses less digits than its factorization.

64144644146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74870 (or 74859 counting only the distinct ones).

The product of its digits is 884736, while the sum is 44.

The spelling of 64144644146 in words is "sixty-four billion, one hundred forty-four million, six hundred forty-four thousand, one hundred forty-six".