1551554553103 has 4 divisors (see below), whose sum is σ = 1551636177048. Its totient is φ = 1551472929160.

The previous prime is 1551554553091. The next prime is 1551554553163. The reversal of 1551554553103 is 3013554551551.

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

It is a cyclic number.

It is not a de Polignac number, because 1551554553103 - 2⁵ = 1551554553071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1551554553103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551554553163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40783453 + ... + 40821478.

It is an arithmetic number, because the mean of its divisors is an integer number (387909044262).

Almost surely, 2^{1551554553103} is an apocalyptic number.

1551554553103 is a deficient number, since it is larger than the sum of its proper divisors (81623945).

1551554553103 is an equidigital number, since it uses as much as digits as its factorization.

1551554553103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81623944.

The product of its (nonzero) digits is 562500, while the sum is 43.

The spelling of 1551554553103 in words is "one trillion, five hundred fifty-one billion, five hundred fifty-four million, five hundred fifty-three thousand, one hundred three".