40345144440 has 32 divisors (see below), whose sum is σ = 121035433680. Its totient is φ = 10758705152.

The previous prime is 40345144423. The next prime is 40345144459. The reversal of 40345144440 is 4444154304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168104649 + ... + 168104888.

Almost surely, 2^40345144440 is an apocalyptic number.

40345144440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40345144440 is an abundant number, since it is smaller than the sum of its proper divisors (80690289240).

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

40345144440 is a wasteful number, since it uses less digits than its factorization.

40345144440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336209551 (or 336209547 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 33.

Adding to 40345144440 its reverse (4444154304), we get a palindrome (44789298744).

The spelling of 40345144440 in words is "forty billion, three hundred forty-five million, one hundred forty-four thousand, four hundred forty".