40511765537491 has 2 divisors, whose sum is σ = 40511765537492. Its totient is φ = 40511765537490.

The previous prime is 40511765537443. The next prime is 40511765537513. The reversal of 40511765537491 is 19473556711504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40511765537491 - 2²¹ = 40511763440339 is a prime.

It is not a weakly prime, because it can be changed into another prime (40511765537791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20255882768745 + 20255882768746.

It is an arithmetic number, because the mean of its divisors is an integer number (20255882768746).

Almost surely, 2^{40511765537491} is an apocalyptic number.

40511765537491 is a deficient number, since it is larger than the sum of its proper divisors (1).

40511765537491 is an equidigital number, since it uses as much as digits as its factorization.

40511765537491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876000, while the sum is 58.

The spelling of 40511765537491 in words is "forty trillion, five hundred eleven billion, seven hundred sixty-five million, five hundred thirty-seven thousand, four hundred ninety-one".