144640700643 has 32 divisors (see below), whose sum is σ = 207865128960. Its totient is φ = 89256545280.

The previous prime is 144640700639. The next prime is 144640700669. The reversal of 144640700643 is 346007046441.

It is not a de Polignac number, because 144640700643 - 2² = 144640700639 is a prime.

It is a super-2 number, since 2×144640700643² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (144640700693) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37971 + ... + 539187.

It is an arithmetic number, because the mean of its divisors is an integer number (6495785280).

Almost surely, 2^144640700643 is an apocalyptic number.

144640700643 is a deficient number, since it is larger than the sum of its proper divisors (63224428317).

144640700643 is a wasteful number, since it uses less digits than its factorization.

144640700643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501387.

The product of its (nonzero) digits is 193536, while the sum is 39.

The spelling of 144640700643 in words is "one hundred forty-four billion, six hundred forty million, seven hundred thousand, six hundred forty-three".