155605104533 has 4 divisors (see below), whose sum is σ = 158156007948. Its totient is φ = 153054201120.

The previous prime is 155605104439. The next prime is 155605104539. The reversal of 155605104533 is 335401506551.

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 9728468689 + 145876635844 = 98633^2 + 381938^2 .

It is a cyclic number.

It is not a de Polignac number, because 155605104533 - 2¹² = 155605100437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155605104539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1275451616 + ... + 1275451737.

It is an arithmetic number, because the mean of its divisors is an integer number (39539001987).

Almost surely, 2^155605104533 is an apocalyptic number.

It is an amenable number.

155605104533 is a deficient number, since it is larger than the sum of its proper divisors (2550903415).

155605104533 is an equidigital number, since it uses as much as digits as its factorization.

155605104533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2550903414.

The product of its (nonzero) digits is 135000, while the sum is 38.

The spelling of 155605104533 in words is "one hundred fifty-five billion, six hundred five million, one hundred four thousand, five hundred thirty-three".