40444324537 has 2 divisors, whose sum is σ = 40444324538. Its totient is φ = 40444324536.

The previous prime is 40444324523. The next prime is 40444324553. The reversal of 40444324537 is 73542344404.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35147250576 + 5297073961 = 187476^2 + 72781^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40444324537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40444324537.

It is not a weakly prime, because it can be changed into another prime (40444324237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20222162268 + 20222162269.

It is an arithmetic number, because the mean of its divisors is an integer number (20222162269).

Almost surely, 2^40444324537 is an apocalyptic number.

It is an amenable number.

40444324537 is a deficient number, since it is larger than the sum of its proper divisors (1).

40444324537 is an equidigital number, since it uses as much as digits as its factorization.

40444324537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 40.

The spelling of 40444324537 in words is "forty billion, four hundred forty-four million, three hundred twenty-four thousand, five hundred thirty-seven".