40196898691 has 2 divisors, whose sum is σ = 40196898692. Its totient is φ = 40196898690.

The previous prime is 40196898689. The next prime is 40196898739. The reversal of 40196898691 is 19689869104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40196898691 - 2¹ = 40196898689 is a prime.

Together with 40196898689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40166898691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20098449345 + 20098449346.

It is an arithmetic number, because the mean of its divisors is an integer number (20098449346).

Almost surely, 2^40196898691 is an apocalyptic number.

40196898691 is a deficient number, since it is larger than the sum of its proper divisors (1).

40196898691 is an equidigital number, since it uses as much as digits as its factorization.

40196898691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6718464, while the sum is 61.

The spelling of 40196898691 in words is "forty billion, one hundred ninety-six million, eight hundred ninety-eight thousand, six hundred ninety-one".