1550015521045 has 4 divisors (see below), whose sum is σ = 1860018625260. Its totient is φ = 1240012416832.

The previous prime is 1550015521009. The next prime is 1550015521091. The reversal of 1550015521045 is 5401255100551.

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 1090951004196 + 459064516849 = 1044486^2 + 677543^2 .

It is a cyclic number.

It is not a de Polignac number, because 1550015521045 - 2³³ = 1541425586453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1550015521045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155001552100 + ... + 155001552109.

It is an arithmetic number, because the mean of its divisors is an integer number (465004656315).

Almost surely, 2^{1550015521045} is an apocalyptic number.

It is an amenable number.

1550015521045 is a deficient number, since it is larger than the sum of its proper divisors (310003104215).

1550015521045 is an equidigital number, since it uses as much as digits as its factorization.

1550015521045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310003104214.

The product of its (nonzero) digits is 25000, while the sum is 34.

The spelling of 1550015521045 in words is "one trillion, five hundred fifty billion, fifteen million, five hundred twenty-one thousand, forty-five".