6440144051 has 48 divisors (see below), whose sum is σ = 7712433792. Its totient is φ = 5353117440.

The previous prime is 6440144033. The next prime is 6440144063. The reversal of 6440144051 is 1504410446.

It is not a de Polignac number, because 6440144051 - 2⁶ = 6440143987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6440144551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11438696 + ... + 11439258.

It is an arithmetic number, because the mean of its divisors is an integer number (160675704).

Almost surely, 2^6440144051 is an apocalyptic number.

6440144051 is a deficient number, since it is larger than the sum of its proper divisors (1272289741).

6440144051 is a wasteful number, since it uses less digits than its factorization.

6440144051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752 (or 741 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 6440144051 is about 80250.5081043105. The cubic root of 6440144051 is about 1860.5093655450.

Adding to 6440144051 its reverse (1504410446), we get a palindrome (7944554497).

The spelling of 6440144051 in words is "six billion, four hundred forty million, one hundred forty-four thousand, fifty-one".