1553740473551 has 16 divisors (see below), whose sum is σ = 1825725554688. Its totient is φ = 1294500657600.

The previous prime is 1553740473541. The next prime is 1553740473577.

1553740473551 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 1553740473551 - 2¹⁰ = 1553740472527 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1553740473551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553740473541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9910655 + ... + 10066208.

It is an arithmetic number, because the mean of its divisors is an integer number (114107847168).

Almost surely, 2^{1553740473551} is an apocalyptic number.

1553740473551 is a deficient number, since it is larger than the sum of its proper divisors (271985081137).

1553740473551 is a wasteful number, since it uses less digits than its factorization.

1553740473551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19977182.

The product of its (nonzero) digits is 4410000, while the sum is 50.

The spelling of 1553740473551 in words is "one trillion, five hundred fifty-three billion, seven hundred forty million, four hundred seventy-three thousand, five hundred fifty-one".