1038494115991 has 2 divisors, whose sum is σ = 1038494115992. Its totient is φ = 1038494115990.

The previous prime is 1038494115881. The next prime is 1038494116069. The reversal of 1038494115991 is 1995114948301.

1038494115991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1038494115991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1038494115391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 519247057995 + 519247057996.

It is an arithmetic number, because the mean of its divisors is an integer number (519247057996).

Almost surely, 2^{1038494115991} is an apocalyptic number.

1038494115991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1038494115991 is an equidigital number, since it uses as much as digits as its factorization.

1038494115991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 55.

The spelling of 1038494115991 in words is "one trillion, thirty-eight billion, four hundred ninety-four million, one hundred fifteen thousand, nine hundred ninety-one".