155803045939 has 2 divisors, whose sum is σ = 155803045940. Its totient is φ = 155803045938.

The previous prime is 155803045933. The next prime is 155803045963. The reversal of 155803045939 is 939540308551.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155803045939 is a prime.

It is not a weakly prime, because it can be changed into another prime (155803045933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77901522969 + 77901522970.

It is an arithmetic number, because the mean of its divisors is an integer number (77901522970).

Almost surely, 2^155803045939 is an apocalyptic number.

155803045939 is a deficient number, since it is larger than the sum of its proper divisors (1).

155803045939 is an equidigital number, since it uses as much as digits as its factorization.

155803045939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916000, while the sum is 52.

The spelling of 155803045939 in words is "one hundred fifty-five billion, eight hundred three million, forty-five thousand, nine hundred thirty-nine".