155150566483721 has 4 divisors (see below), whose sum is σ = 155150676044052. Its totient is φ = 155150456923392.

The previous prime is 155150566483643. The next prime is 155150566483763. The reversal of 155150566483721 is 127384665051551.

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 92604438534400 + 62546127949321 = 9623120^2 + 7908611^2 .

It is a cyclic number.

It is not a de Polignac number, because 155150566483721 - 2¹⁸ = 155150566221577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (155150566483021) 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, 52627796 + ... + 55497621.

It is an arithmetic number, because the mean of its divisors is an integer number (38787669011013).

Almost surely, 2^{155150566483721} is an apocalyptic number.

It is an amenable number.

155150566483721 is a deficient number, since it is larger than the sum of its proper divisors (109560331).

155150566483721 is a wasteful number, since it uses less digits than its factorization.

155150566483721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109560330.

The product of its (nonzero) digits is 30240000, while the sum is 59.

The spelling of 155150566483721 in words is "one hundred fifty-five trillion, one hundred fifty billion, five hundred sixty-six million, four hundred eighty-three thousand, seven hundred twenty-one".