1555540235505 has 16 divisors (see below), whose sum is σ = 2765404863360. Its totient is φ = 829621458864.

The previous prime is 1555540235489. The next prime is 1555540235531. The reversal of 1555540235505 is 5055320455551.

1555540235505 is a `hidden beast` number, since 1 + 5 + 5 + 55 + 40 + 2 + 3 + 550 + 5 = 666.

It is not a de Polignac number, because 1555540235505 - 2⁴ = 1555540235489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 5761259997 + ... + 5761260266.

It is an arithmetic number, because the mean of its divisors is an integer number (172837803960).

Almost surely, 2^{1555540235505} is an apocalyptic number.

1555540235505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1555540235505 is a deficient number, since it is larger than the sum of its proper divisors (1209864627855).

1555540235505 is a wasteful number, since it uses less digits than its factorization.

1555540235505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11522520277 (or 11522520271 counting only the distinct ones).

The product of its (nonzero) digits is 1875000, while the sum is 45.

The spelling of 1555540235505 in words is "one trillion, five hundred fifty-five billion, five hundred forty million, two hundred thirty-five thousand, five hundred five".