1351000123555 has 4 divisors (see below), whose sum is σ = 1621200148272. Its totient is φ = 1080800098840.

The previous prime is 1351000123453. The next prime is 1351000123591. The reversal of 1351000123555 is 5553210001531.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1351000123555 - 2¹⁷ = 1350999992483 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135100012351 + ... + 135100012360.

It is an arithmetic number, because the mean of its divisors is an integer number (405300037068).

Almost surely, 2^{1351000123555} is an apocalyptic number.

1351000123555 is a deficient number, since it is larger than the sum of its proper divisors (270200024717).

1351000123555 is an equidigital number, since it uses as much as digits as its factorization.

1351000123555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270200024716.

The product of its (nonzero) digits is 11250, while the sum is 31.

The spelling of 1351000123555 in words is "one trillion, three hundred fifty-one billion, one hundred twenty-three thousand, five hundred fifty-five".