155803045949 has 4 divisors (see below), whose sum is σ = 156214136160. Its totient is φ = 155391955740.

The previous prime is 155803045939. The next prime is 155803045963. The reversal of 155803045949 is 949540308551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 155803045949 - 2⁴ = 155803045933 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155803045949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155803045939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205544537 + ... + 205545294.

It is an arithmetic number, because the mean of its divisors is an integer number (39053534040).

Almost surely, 2^155803045949 is an apocalyptic number.

It is an amenable number.

155803045949 is a deficient number, since it is larger than the sum of its proper divisors (411090211).

155803045949 is an equidigital number, since it uses as much as digits as its factorization.

155803045949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411090210.

The product of its (nonzero) digits is 3888000, while the sum is 53.

The spelling of 155803045949 in words is "one hundred fifty-five billion, eight hundred three million, forty-five thousand, nine hundred forty-nine".