1081386491923 has 2 divisors, whose sum is σ = 1081386491924. Its totient is φ = 1081386491922.

The previous prime is 1081386491863. The next prime is 1081386491957. The reversal of 1081386491923 is 3291946831801.

It is a happy number.

1081386491923 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-1081386491923 is a prime.

It is not a weakly prime, because it can be changed into another prime (1081386491123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540693245961 + 540693245962.

It is an arithmetic number, because the mean of its divisors is an integer number (540693245962).

Almost surely, 2^{1081386491923} is an apocalyptic number.

1081386491923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081386491923 is an equidigital number, since it uses as much as digits as its factorization.

1081386491923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2239488, while the sum is 55.

The spelling of 1081386491923 in words is "one trillion, eighty-one billion, three hundred eighty-six million, four hundred ninety-one thousand, nine hundred twenty-three".