155564155066 has 4 divisors (see below), whose sum is σ = 233346232602. Its totient is φ = 77782077532.

The previous prime is 155564155057. The next prime is 155564155093. The reversal of 155564155066 is 660551465551.

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

It can be written as a sum of positive squares in only one way, i.e., 144099956025 + 11464199041 = 379605^2 + 107071^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38891038765 + ... + 38891038768.

Almost surely, 2^155564155066 is an apocalyptic number.

155564155066 is a deficient number, since it is larger than the sum of its proper divisors (77782077536).

155564155066 is an equidigital number, since it uses as much as digits as its factorization.

155564155066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77782077535.

The product of its (nonzero) digits is 2700000, while the sum is 49.

The spelling of 155564155066 in words is "one hundred fifty-five billion, five hundred sixty-four million, one hundred fifty-five thousand, sixty-six".