1556555351461 has 16 divisors (see below), whose sum is σ = 1744375727808. Its totient is φ = 1376472700800.

The previous prime is 1556555351443. The next prime is 1556555351471. The reversal of 1556555351461 is 1641535556551.

It is a cyclic number.

It is not a de Polignac number, because 1556555351461 - 2¹⁵ = 1556555318693 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1556555351399 and 1556555351408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1556555351411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1229826 + ... + 2150716.

It is an arithmetic number, because the mean of its divisors is an integer number (109023482988).

Almost surely, 2^{1556555351461} is an apocalyptic number.

1556555351461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1556555351461 is a deficient number, since it is larger than the sum of its proper divisors (187820376347).

1556555351461 is a wasteful number, since it uses less digits than its factorization.

1556555351461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925092.

The product of its digits is 6750000, while the sum is 52.

The spelling of 1556555351461 in words is "one trillion, five hundred fifty-six billion, five hundred fifty-five million, three hundred fifty-one thousand, four hundred sixty-one".