40001011503491 has 2 divisors, whose sum is σ = 40001011503492. Its totient is φ = 40001011503490.

The previous prime is 40001011503469. The next prime is 40001011503697. The reversal of 40001011503491 is 19430511010004.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40001011503491 is a prime.

It is not a weakly prime, because it can be changed into another prime (40001011503391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20000505751745 + 20000505751746.

It is an arithmetic number, because the mean of its divisors is an integer number (20000505751746).

Almost surely, 2^{40001011503491} is an apocalyptic number.

40001011503491 is a deficient number, since it is larger than the sum of its proper divisors (1).

40001011503491 is an equidigital number, since it uses as much as digits as its factorization.

40001011503491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 29.

Adding to 40001011503491 its reverse (19430511010004), we get a palindrome (59431522513495).

The spelling of 40001011503491 in words is "forty trillion, one billion, eleven million, five hundred three thousand, four hundred ninety-one".