155216773433 has 4 divisors (see below), whose sum is σ = 156205415460. Its totient is φ = 154228131408.

The previous prime is 155216773423. The next prime is 155216773471. The reversal of 155216773433 is 334377612551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36630897664 + 118585875769 = 191392^2 + 344363^2 .

It is a cyclic number.

It is not a de Polignac number, because 155216773433 - 2⁴ = 155216773417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155216773423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494320778 + ... + 494321091.

It is an arithmetic number, because the mean of its divisors is an integer number (39051353865).

Almost surely, 2^155216773433 is an apocalyptic number.

It is an amenable number.

155216773433 is a deficient number, since it is larger than the sum of its proper divisors (988642027).

155216773433 is an equidigital number, since it uses as much as digits as its factorization.

155216773433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988642026.

The product of its digits is 1587600, while the sum is 47.

The spelling of 155216773433 in words is "one hundred fifty-five billion, two hundred sixteen million, seven hundred seventy-three thousand, four hundred thirty-three".