1550220287645 has 16 divisors (see below), whose sum is σ = 2073359643840. Its totient is φ = 1105791807744.

The previous prime is 1550220287593. The next prime is 1550220287659. The reversal of 1550220287645 is 5467820220551.

It is a cyclic number.

It is not a de Polignac number, because 1550220287645 - 2¹⁴ = 1550220271261 is a prime.

It is a super-2 number, since 2×1550220287645² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1550220287645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 479942747 + ... + 479945976.

It is an arithmetic number, because the mean of its divisors is an integer number (129584977740).

Almost surely, 2^{1550220287645} is an apocalyptic number.

It is an amenable number.

1550220287645 is a deficient number, since it is larger than the sum of its proper divisors (523139356195).

1550220287645 is a wasteful number, since it uses less digits than its factorization.

1550220287645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959888764.

The product of its (nonzero) digits is 1344000, while the sum is 47.

The spelling of 1550220287645 in words is "one trillion, five hundred fifty billion, two hundred twenty million, two hundred eighty-seven thousand, six hundred forty-five".