2491438905311 has 2 divisors, whose sum is σ = 2491438905312. Its totient is φ = 2491438905310.

The previous prime is 2491438905287. The next prime is 2491438905343. The reversal of 2491438905311 is 1135098341942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2491438905311 - 2³⁰ = 2490365163487 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2491438905311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2491438905611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1245719452655 + 1245719452656.

It is an arithmetic number, because the mean of its divisors is an integer number (1245719452656).

Almost surely, 2^{2491438905311} is an apocalyptic number.

2491438905311 is a deficient number, since it is larger than the sum of its proper divisors (1).

2491438905311 is an equidigital number, since it uses as much as digits as its factorization.

2491438905311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 50.

The spelling of 2491438905311 in words is "two trillion, four hundred ninety-one billion, four hundred thirty-eight million, nine hundred five thousand, three hundred eleven".