38401960991 has 2 divisors, whose sum is σ = 38401960992. Its totient is φ = 38401960990.

The previous prime is 38401960981. The next prime is 38401960997. The reversal of 38401960991 is 19906910483.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38401960991 - 2³⁰ = 37328219167 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38401960997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19200980495 + 19200980496.

It is an arithmetic number, because the mean of its divisors is an integer number (19200980496).

Almost surely, 2^38401960991 is an apocalyptic number.

38401960991 is a deficient number, since it is larger than the sum of its proper divisors (1).

38401960991 is an equidigital number, since it uses as much as digits as its factorization.

38401960991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 50.

The spelling of 38401960991 in words is "thirty-eight billion, four hundred one million, nine hundred sixty thousand, nine hundred ninety-one".