1555055555555 has 8 divisors (see below), whose sum is σ = 1868239042800. Its totient is φ = 1242596193696.

The previous prime is 1555055555551. The next prime is 1555055555561. The reversal of 1555055555555 is 5555555505551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1555055555555 - 2² = 1555055555551 is a prime.

1555055555555 is a modest number, since divided by 5555555 gives 155505 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 1555055555555.

It is not an unprimeable number, because it can be changed into a prime (1555055555551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181026620 + ... + 181035209.

It is an arithmetic number, because the mean of its divisors is an integer number (233529880350).

Almost surely, 2^{1555055555555} is an apocalyptic number.

1555055555555 is a deficient number, since it is larger than the sum of its proper divisors (313183487245).

1555055555555 is an equidigital number, since it uses as much as digits as its factorization.

1555055555555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362062693.

The product of its (nonzero) digits is 48828125, while the sum is 56.

The spelling of 1555055555555 in words is "one trillion, five hundred fifty-five billion, fifty-five million, five hundred fifty-five thousand, five hundred fifty-five".