155550563 has 8 divisors (see below), whose sum is σ = 180276480. Its totient is φ = 131450760.

The previous prime is 155550557. The next prime is 155550581. The reversal of 155550563 is 365055551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 155550563 - 2⁴ = 155550547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155550503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155993 + ... + 156986.

It is an arithmetic number, because the mean of its divisors is an integer number (22534560).

Almost surely, 2^155550563 is an apocalyptic number.

155550563 is a deficient number, since it is larger than the sum of its proper divisors (24725917).

155550563 is an equidigital number, since it uses as much as digits as its factorization.

155550563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313057.

The product of its (nonzero) digits is 56250, while the sum is 35.

The square root of 155550563 is about 12471.9911401508. The cubic root of 155550563 is about 537.8037949475.

The spelling of 155550563 in words is "one hundred fifty-five million, five hundred fifty thousand, five hundred sixty-three".