153811081891 has 2 divisors, whose sum is σ = 153811081892. Its totient is φ = 153811081890.

The previous prime is 153811081757. The next prime is 153811081903. The reversal of 153811081891 is 198180118351.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-153811081891 is a prime.

It is not a weakly prime, because it can be changed into another prime (153811084891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76905540945 + 76905540946.

It is an arithmetic number, because the mean of its divisors is an integer number (76905540946).

Almost surely, 2^153811081891 is an apocalyptic number.

153811081891 is a deficient number, since it is larger than the sum of its proper divisors (1).

153811081891 is an equidigital number, since it uses as much as digits as its factorization.

153811081891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 46.

The spelling of 153811081891 in words is "one hundred fifty-three billion, eight hundred eleven million, eighty-one thousand, eight hundred ninety-one".