40991490863 has 2 divisors, whose sum is σ = 40991490864. Its totient is φ = 40991490862.

The previous prime is 40991490851. The next prime is 40991490889. The reversal of 40991490863 is 36809419904.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40991490863 - 2²⁰ = 40990442287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40991490803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20495745431 + 20495745432.

It is an arithmetic number, because the mean of its divisors is an integer number (20495745432).

Almost surely, 2^40991490863 is an apocalyptic number.

40991490863 is a deficient number, since it is larger than the sum of its proper divisors (1).

40991490863 is an equidigital number, since it uses as much as digits as its factorization.

40991490863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1679616, while the sum is 53.

The spelling of 40991490863 in words is "forty billion, nine hundred ninety-one million, four hundred ninety thousand, eight hundred sixty-three".