40144305631 has 24 divisors (see below), whose sum is σ = 44642245392. Its totient is φ = 35963769600.

The previous prime is 40144305559. The next prime is 40144305671. The reversal of 40144305631 is 13650344104.

It is a happy number.

It is not a de Polignac number, because 40144305631 - 2¹¹ = 40144303583 is a prime.

It is a super-2 number, since 2×40144305631² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 40144305593 and 40144305602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40144305671) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 976416 + ... + 1016698.

It is an arithmetic number, because the mean of its divisors is an integer number (1860093558).

Almost surely, 2^40144305631 is an apocalyptic number.

40144305631 is a deficient number, since it is larger than the sum of its proper divisors (4497939761).

40144305631 is a wasteful number, since it uses less digits than its factorization.

40144305631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40423 (or 40392 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 40144305631 its reverse (13650344104), we get a palindrome (53794649735).

The spelling of 40144305631 in words is "forty billion, one hundred forty-four million, three hundred five thousand, six hundred thirty-one".