1550655561111 has 16 divisors (see below), whose sum is σ = 2112429570048. Its totient is φ = 1011344684000.

The previous prime is 1550655561101. The next prime is 1550655561127. The reversal of 1550655561111 is 1111655560551.

It is not a de Polignac number, because 1550655561111 - 2¹⁴ = 1550655544727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550655561101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2007420 + ... + 2670401.

It is an arithmetic number, because the mean of its divisors is an integer number (132026848128).

Almost surely, 2^{1550655561111} is an apocalyptic number.

1550655561111 is a deficient number, since it is larger than the sum of its proper divisors (561774008937).

1550655561111 is a wasteful number, since it uses less digits than its factorization.

1550655561111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4680222.

The product of its (nonzero) digits is 112500, while the sum is 42.

The spelling of 1550655561111 in words is "one trillion, five hundred fifty billion, six hundred fifty-five million, five hundred sixty-one thousand, one hundred eleven".