1555000555005 has 24 divisors (see below), whose sum is σ = 2761074159480. Its totient is φ = 809105978880.

The previous prime is 1555000554983. The next prime is 1555000555013. The reversal of 1555000555005 is 5005550005551.

It is a happy number.

1555000555005 is a `hidden beast` number, since 1 + 5 + 550 + 0 + 0 + 55 + 50 + 0 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5341563396 + 1549658991609 = 73086^2 + 1244853^2 .

It is not a de Polignac number, because 1555000555005 - 2⁵ = 1555000554973 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 421407520 + ... + 421411209.

It is an arithmetic number, because the mean of its divisors is an integer number (115044756645).

Almost surely, 2^{1555000555005} is an apocalyptic number.

1555000555005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1555000555005 is a deficient number, since it is larger than the sum of its proper divisors (1206073604475).

1555000555005 is a wasteful number, since it uses less digits than its factorization.

1555000555005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842818781 (or 842818778 counting only the distinct ones).

The product of its (nonzero) digits is 78125, while the sum is 36.

The spelling of 1555000555005 in words is "one trillion, five hundred fifty-five billion, five hundred fifty-five thousand, five".