1555550105145 has 16 divisors (see below), whose sum is σ = 2499844403520. Its totient is φ = 825971977664.

The previous prime is 1555550105093. The next prime is 1555550105191. The reversal of 1555550105145 is 5415010555551.

It is a cyclic number.

It is not a de Polignac number, because 1555550105145 - 2¹⁶ = 1555550039609 is a prime.

It is a super-2 number, since 2×1555550105145² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1555550105097 and 1555550105106.

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, 228418050 + ... + 228424859.

It is an arithmetic number, because the mean of its divisors is an integer number (156240275220).

Almost surely, 2^{1555550105145} is an apocalyptic number.

1555550105145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1555550105145 is a deficient number, since it is larger than the sum of its proper divisors (944294298375).

1555550105145 is a wasteful number, since it uses less digits than its factorization.

1555550105145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456843144.

The product of its (nonzero) digits is 312500, while the sum is 42.

The spelling of 1555550105145 in words is "one trillion, five hundred fifty-five billion, five hundred fifty million, one hundred five thousand, one hundred forty-five".